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Worked answers to the questions that come up running a card shelf: what an item cost, what it kept, and where it is. Each one shows the arithmetic.

Keeping your own SKU when CardUploader managed inventory puts a CS- SKU on eBay

The CS- SKU names the listing and your SKU names the card. How to keep each copy's own SKU right and pull the copy the Orders page names.

The minimum price for a single card on eBay after fees, postage and cost

eBay's fee is charged on shipping and tax too. The formula for the lowest price that pays for itself, with $0.99, $1.99 and $2.99 worked through.

Chaos sorting card singles for eBay: setting up, refilling, and finding the card that sold

Cards go wherever there is room and the address says where. How to set it up, keep it filled, and pull a day's orders in one walk.

How to split a bulk lot's cost across the singles you pull from it

One receipt, dozens of cards. Split the cost by value so each card carries its own, with a $120 lot worked through.