A supplier shipped 500 units. The retailer sold 320. Both numbers are true, and they answer different questions. Retail buying blends inventory plans, price setting, promotional funding and contract deductions. The language can blur supplier sales with consumer demand, or a retailer chargeback with a card dispute. This guide follows inventory from sell-in to sell-out, then covers margin planning, trade spend and who owns unsold goods. Keep units, periods and contract rules beside every measure.
🧭 Jump to a term
Follow inventory and demand: Sell-in · Sell-out · Sell-through rate · Open-to-buy (OTB) · GMROI
Set price and plan trade investment: Wholesale price · Initial markup (IMU) · Keystone pricing · Trade spend · Slotting fee · Promotional allowance · Markdown allowance
Reconcile terms and assortment: Retailer chargeback · Consignment · Sale-or-return · Range review
⭐ Know these first
Start with Sell-in, Sell-out, Sell-through rate, Open-to-buy (OTB), Retailer chargeback. Then follow the grouped learning order below.
📎 How to read this page
What it means gives the precise meaning. Operator translation gives the version you might hear in a real ecommerce meeting. In real life shows an illustrative example. Watch out and the confusion boxes show where a familiar term can mislead.
📈 Read the relationships first
These combinations are diagnostic hypotheses, not proof of causality. Compare the same period and scope, then investigate the mechanism.
📦 Sell-in ↑ + sell-out flat
Usually means: Retailer inventory may be building faster than shoppers are buying. Check next: Compare receipts, sell-through and weeks of supply.
🏷️ Promotional allowance ↑ + sell-through ↑
Usually means: The promotion may move units, but compare net margin and the eligible period.. Check next:
💳 Retailer chargebacks ↑ + supplier deductions ↑
Usually means: A compliance or data issue may recur. Check next: Segment by reason code and contract clause.
📉 Markdown allowance ↑ + range removal ↑
Usually means: The assortment may be underperforming or overstocked. Check next: Compare affected products and remaining stock.
Follow inventory and demand
01 · 🟢 Core
Sell-in = Units or value a supplier sells to a retailer
🧠 What it means
Sell-in measures a supplier’s sales to a retailer or distributor. State whether the measure uses units, revenue or another basis and the period.
💬 OPERATOR TRANSLATION
“The brand sold it to the retailer, before the shopper entered the story.”
🛍️ In real life
A brand ships 500 units to a retailer’s distribution center in March.
🔗 Related: Sell-out · Sell-through rate · Open-to-buy (OTB) · ↑ all terms
02 · 🟢 Core
Sell-out = Units or value a retailer sells to end customers
🧠 What it means
Sell-out measures retail sales from a retailer to final customers. It differs from supplier sell-in and may be reported in units or value.
💬 OPERATOR TRANSLATION
“This is what shoppers bought from the store.”
🛍️ In real life
The retailer sells 320 of 500 received units during March.
🔗 Related: Sell-in · Sell-through rate · Open-to-buy (OTB) · ↑ all terms
03 · 🟢 Core
Sell-through rate = Share of available inventory sold in a period
🧠 What it means
Sell-through compares units sold with a defined inventory denominator over a period. Specify beginning stock, receipts, returns and date range.
💬 OPERATOR TRANSLATION
“It tells you how much of the stock moved, once the denominator is clear.”
🛍️ In real life
A store sells 60 of 100 units available for a seasonal launch.
🔗 Related: Sell-in · Sell-out · Open-to-buy (OTB) · ↑ all terms
04 · 🟢 Core
Open-to-buy (OTB) = Planned purchasing capacity remaining
🧠 What it means
Open-to-buy is a retailer’s planned inventory purchasing capacity after accounting for budget, stock and expected receipts or sales. Formula and valuation basis vary.
💬 OPERATOR TRANSLATION
“How much room remains in the buying plan?”
🛍️ In real life
A buyer reviews the remaining seasonal budget before placing another order.
🔗 Related: Sell-in · Sell-out · Sell-through rate · ↑ all terms
05 · 🔵 Operations
GMROI = Gross margin earned per inventory investment
🧠 What it means
Gross margin return on inventory investment relates gross margin dollars to average inventory cost over a stated period. Keep the accounting basis consistent.
💬 OPERATOR TRANSLATION
“How much gross margin did the inventory investment earn?”
🛍️ In real life
A category earns $80,000 gross margin on $40,000 average inventory cost: GMROI is 2.0.
🔗 Related: Sell-in · Sell-out · Sell-through rate · ↑ all terms
Set price and plan trade investment
06 · 🔵 Operations
Wholesale price = Price a supplier charges a wholesale buyer
🧠 What it means
Wholesale price is the agreed supplier-to-buyer price before separately specified discounts, allowances, freight or taxes. Contract terms determine net economics.
💬 OPERATOR TRANSLATION
“This is the buyer’s unit price before the other lines.”
🛍️ In real life
A retailer pays $20 per unit before a separate promotion allowance.
🔗 Related: Initial markup (IMU) · Keystone pricing · Trade spend · ↑ all terms
07 · 🔵 Operations
Initial markup (IMU) = Planned retail price difference above initial cost
🧠 What it means
Initial markup compares intended retail price with initial cost using a defined denominator. It is a planning measure before markdowns and other reductions.
💬 OPERATOR TRANSLATION
“The ticket price starts above the cost, before discounts and expenses.”
🛍️ In real life
A $50 ticket price on a $25 item is a 50% markup on retail price.
🔗 Related: Wholesale price · Keystone pricing · Trade spend · ↑ all terms
08 · 🔵 Operations
Keystone pricing = Retail price set at twice wholesale cost
🧠 What it means
Keystone is a rule of thumb that doubles wholesale cost to set an initial retail price. It does not guarantee profit after operating costs or discounts.
💬 OPERATOR TRANSLATION
“A two-times shortcut for setting the initial ticket.”
🛍️ In real life
A product bought for $30 wholesale receives a $60 initial retail price.
🔗 Related: Wholesale price · Initial markup (IMU) · Trade spend · ↑ all terms
09 · 🔵 Operations
Trade spend = Supplier investment in retailer-facing commercial activity
🧠 What it means
Trade spend is supplier funding or value supporting retailer activities, promotions or agreements. Track type, timing, accrual and net-sales treatment.
💬 OPERATOR TRANSLATION
“Money spent to help the product move through the trade channel.”
🛍️ In real life
A supplier funds an agreed seasonal promotion with a retailer.
🔗 Related: Wholesale price · Initial markup (IMU) · Keystone pricing · ↑ all terms
10 · 🔵 Operations
Slotting fee = Fee tied to product placement in a retailer assortment
🧠 What it means
A slotting or retail listing fee is a negotiated charge related to product placement or inclusion. Terms, practice and legality vary by market and agreement.
💬 OPERATOR TRANSLATION
“A shelf launch may come with a negotiated placement cost.”
🛍️ In real life
A retailer requests a one-time fee to introduce a new product.
🔗 Related: Wholesale price · Initial markup (IMU) · Keystone pricing · ↑ all terms
11 · 🔵 Operations
Promotional allowance = Supplier funding for a retail promotion
🧠 What it means
A promotional allowance is supplier funding or a price reduction tied to a retailer promotion. Reconcile eligibility, timing and proof of execution.
💬 OPERATOR TRANSLATION
“Temporary supplier support for a specified promotion.”
🛍️ In real life
A brand offers a per-unit allowance during a two-week promotion.
🔗 Related: Wholesale price · Initial markup (IMU) · Keystone pricing · ↑ all terms
12 · 🔵 Operations
Markdown allowance = Supplier funding for an agreed retail price reduction
🧠 What it means
A markdown allowance compensates a retailer under agreed terms for lowering a product price. Reconcile it to eligible units and distinguish it from general promotion funding.
💬 OPERATOR TRANSLATION
“Supplier funding offsets a defined price reduction.”
🛍️ In real life
A supplier reimburses a retailer for an agreed markdown on seasonal stock.
🔗 Related: Wholesale price · Initial markup (IMU) · Keystone pricing · ↑ all terms
Reconcile terms and assortment
13 · 🟢 Core
Retailer chargeback = Commercial deduction claimed against a supplier invoice
🧠 What it means
A retailer chargeback is a deduction under trading terms, often for shortages, labeling or delivery noncompliance. It is not a payment-card dispute.
💬 OPERATOR TRANSLATION
“A retailer deducted money for a claimed contract or delivery issue.”
🛍️ In real life
A retailer deducts an amount after a shipment misses routing-label requirements.
🔗 Related: Consignment · Sale-or-return · Range review · ↑ all terms
14 · 🔵 Operations
Consignment = Supplier retains ownership until goods are sold
🧠 What it means
Under consignment, a supplier places goods with a retailer but retains ownership until sale or another agreed trigger. Payment, loss and return terms belong in the contract.
💬 OPERATOR TRANSLATION
“The stock is in the store; ownership has not transferred yet.”
🛍️ In real life
A brand places stock in a shop and invoices only units sold.
🔗 Related: Retailer chargeback · Sale-or-return · Range review · ↑ all terms
15 · 🔵 Operations
Sale-or-return = Unsold goods may be returned under agreed terms
🧠 What it means
Sale-or-return permits a buyer to return eligible unsold goods under contractual conditions. It differs from consignment in ownership, invoicing and risk allocation.
💬 OPERATOR TRANSLATION
“The retailer buys, with a defined option to return qualifying unsold stock.”
🛍️ In real life
A retailer purchases a seasonal range with a contractual return right.
🔗 Related: Retailer chargeback · Consignment · Range review · ↑ all terms
16 · 🔵 Operations
Range review = Retailer assessment of assortment for future inclusion
🧠 What it means
A range review is a retailer’s periodic assessment of which products to list, keep, expand or remove, considering sales, margin, customer fit and supply.
💬 OPERATOR TRANSLATION
“The buyer decides which SKUs keep their shelf space.”
🛍️ In real life
A buyer reviews category results before choosing next season’s range.
🔗 Related: Retailer chargeback · Consignment · Sale-or-return · ↑ all terms
🔀 Sell-in vs sell-out
Sell-in is the supplier sale to a retailer. Sell-out is the retailer sale to the end customer. They use separate ledgers.
🔀 Gross profit vs markup vs margin
Gross profit is an amount. Margin is a ratio over a defined revenue base. Markup compares price and cost on its stated base.
🔀 Retailer chargeback vs card chargeback
A retailer chargeback is a commercial invoice deduction. A card chargeback is a payment dispute.
🔀 Consignment vs sale-or-return
Consignment usually retains supplier ownership until sale. Sale-or-return generally involves a buyer purchase with defined return rights. Contract details control.
🤔 Still confused?
Follow this thread: Sell-in → Wholesale price → Retailer chargeback. That sequence moves from the basic object or relationship to the decisions and checks it supports.
Sources and scope
Primary documentation checked on 27 September 2026. Platform features and eligibility can change; examples and cartoon situations are illustrative.
