Retail math, made useful

Tools for better margin decisions.

Small calculators for the moments when a headline metric needs a closer look.

Discount Drift

See how discount depth quietly changes the margin you keep on every order.

Compare bundle economics against the single-item sales they replace.

Separate the AOV lift that looks good in a report from the profit it actually creates.

Measure the orders a promotion truly caused, not just the lift it appears to create.

Count the subsidy in your acquisition cost and see how long it takes to earn back.

Put the tidy lifetime-value formula next to what customers actually do over time.

Find the acquisition channels that a blended ratio is hiding in plain sight.