A live course here is complete: every lesson, every formula, the spreadsheet. All of it is open, no email needed. Each says whether it is for Amazon, Shopify or both. Run it on your own numbers tonight. The planned ones open the same way, each once it is finished.
Find what Amazon's fee steps cost any listing, from five numbers on its public page.
The 2026 cards, the four edges, volume from rank, ten thousand simulated months, and the 271-day storage cliff.
Start lesson 1, no email neededAlso free, complete now
Read your own price elasticity, find the price that makes the most, and price every raise and discount before you run it.
Elasticity from your own sales history with an honest interval, the best price with your platform's fees split the way they move, the break-even on a raise and a discount, and steps of at most 5% you can measure.
Take the courseHow long a dollar is gone, where your bank balance bottoms out, when to wire and how much, and how much cash to hold.
The cash conversion cycle, the low point after a wire, the reorder point and order from your own sales, the service level each SKU's margin pays for, hold against liquidate, and the cash a bad month needs.
Take the courseWhere an order's money goes, the pound line under every parcel, what free shipping costs, and the most an ad sale can cost.
Shopify Payments and USPS Ground Advantage by zone, the 2 lb step a fraction of an ounce past a pound, the free-shipping line, the compare-at you never charge, break-even ROAS, and your own Products export read in your browser.
Take the courseContribution margin, the ad target your margin sets, lifetime value on margin, payback, and the numbers in a P&L that mislead.
Contribution before ads and after, break-even ROAS and ACOS, the last ad dollar against the average, LTV to CAC on margin over a year, the week a customer pays back, and your own Orders export read in your browser.
Take the coursePlanned for the library · free and open when each is complete
Fees, leakage, reimbursements, and the unit costs no report shows you.
Sample size, base rates, survivorship bias, expected value, and Monte Carlo on one real decision.