Duck CheckedBatch math ยท Reviewed July 30, 2026
What will each finished item really cost?
A $3 blank does not become a $3 shirt. Put the transfer, wasted material, shipping, supplies, and expected mistakes into the same pile.
Use your real project
Count the stuff that gets used up
This is cost, not a selling price
Your time, tools, electricity, fees, taxes, and profit still need a home. Add what you know to supplies, then keep the result labeled as an estimate.