How the Grocery Sharing Tool Works
The Grocery Share Calculator allows multiple people to coordinate and divide grocery orders before checkout.
Operators using the Costco Platform can provide customers with a shareable link to the calculator, allowing groups to organize their grocery selections together.
Each participant selects the items and quantities they want. The calculator then automatically totals:
• individual item selections
• proportional service fees
• estimated tax, gratuity, and delivery costs​
Once the group finalizes their selections, the combined order can be placed through the operator’s storefront.
This system works especially well for:
• vacation rental groups
• workplace grocery orders
• multi-family households
• community gatherings​
• event planning
Sharing Items - Automatic Cost Calculations
The Grocery Share Calculator calculates costs only for the items and quantities each participant selects for themselves.
For Shareable Items, the full Costco item is purchased as-is. Participants may coordinate who takes leftover portions using item notes, but the calculator does not automatically divide or assign portions of a bulk item unless those portions are entered explicitly.
For Split Items, pricing is already standardized per unit. Each participant selects the exact number of split units they want, and the calculator totals those selections automatically.
What is calculated automatically:
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Individual subtotals based on selected items
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Proportional allocation of estimated sales tax, delivery, service, and tip fees
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A clear total owed per participant
No spreadsheets. No assumptions. No forced allocations.
Cost Calculation Transparency
Co-Op Shopper separates how items are offered from how costs are calculated.
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Shareable Items are coordinated by the group and tracked for transparency.
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Split Items are pre-defined, individually priced, and calculated per unit.
The Grocery Share Calculator never assumes how an item should be divided. Each person pays for exactly what they select, and any sharing arrangements are handled by the group—not guessed by the system.
This keeps the process simple, fair, and predictable—whether you’re sharing a full Costco multipack or selecting individual split units.
Operator Handling & Coordination
Operators may offer Shared Order Coordination as an optional service.
When customers organize shared grocery orders, the operator may charge a coordination or packaging fee for:
• organizing group orders
• purchasing bulk groceries
• separating items for participants
• labeling and packaging shared items
This helps compensate operators for the additional work involved in handling shared grocery orders. Operators define their own pricing structure for these services.
How Sharing & Split Item Shopping Differ
Split items and shareable items serve different purposes.
Split items allow customers to purchase individually packaged units taken from a Costco multipack.
Shareable items are full Costco products purchased together by a group, with the cost divided among participants using the Grocery Share Calculator.
This flexibility allows operators to serve both individual shoppers and coordinated group orders, increasing overall basket size and operational efficiency.
Shareable Item Guidelines
Some multipacks can be separated into individual units while keeping factory packaging and labeling. These are eligible for Operator-Splittable Sharing.
If a multipack does not have factory-labeled inner units, it may still be eligible for Group-Managed Sharing—the order is delivered as a full multipack, and your group divides items after delivery. The Sharing Calculator can still split costs either way.
Group grocery orders are often significantly larger than individual household orders.