Tape Calculator
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💡 Quick Tip
Unlike phone calculators, this keeps your running total until you hit C. Perfect for adding up garage sale hauls!
📚 Why a Tape Calculator?
🧮 The Garage Sale Problem
Standard calculators wipe your work when you hit Clear.
At a garage sale, you're building up multiple "lots" - $5 for these books, $10 for tools, $3 for records...
Tape Calculator Logic: Like an old accounting machine, this keeps your running total visible. Add items as you shop, then make one offer for the whole pile.
⚡ Quick Reseller Math
The 3x Rule: If you can't sell it for 3x what you paid, skip it. This covers fees, shipping surprises, and returns.
Quick Fee Math:
eBay: Multiply sale price by 0.87 (keeps 87%)
Mercari: Multiply by 0.90 (keeps 90%)
Poshmark: Multiply by 0.80 (keeps 80%)
Quick Fee Math:
eBay: Multiply sale price by 0.87 (keeps 87%)
Mercari: Multiply by 0.90 (keeps 90%)
Poshmark: Multiply by 0.80 (keeps 80%)