Free calculator · Reselling

Can you afford this buy?

A profitable business can run out of money by growing. Run any big buy through the next eight weeks — your free cash, your hours — and let three gates you set in advance say yes or no.

The forecast Eight weeks, with and without the buy

Where you are this week

Your ordinary week

The buy you're weighing

A skipped route saves its buying and its hours (below).

Your gates

The gates

Cash gate — lowest open-to-buy —
Hours gate — busiest week —
Payback gate — week 8 vs no-buy —
Verdict —

Open-to-buy, week by week

Your hours, week by week

Two charts on purpose: money and hours are different scales, so they never share an axis. Bars over the ceiling turn orange and say so when you hover — or open the table under each chart for every number.

Gates written before the offer arrives — and a forecast tested against real weeks — are the method in Reselling — Advanced →

How to read it Profit is not cash

Profit is what a sale leaves once it's sold. Cash is what's in the account on Saturday. Between them sit the weeks a thing spends on the shelf. A buy takes all its money on day one and gives it back a few items at a time — so a business can be profitable every month and still find, the week after a big buy, that it can't afford its ordinary Saturday.

A worked example

The defaults are the book's: a $600 lot of about forty items, each expected to clear about $19.50, selling four a week from week three, taking four extra hours a week — with two ordinary Saturday routes skipped to make room. Open-to-buy falls from $850 to about $257 in week one, stays above the $150 gate, and ends week eight at about $1,254 against the no-buy baseline's $906. Hours peak at 14.6, under a 15-hour ceiling. All three gates pass: yes — only if those two routes are actually skipped. Add live selling's three or four hours on top and the hours gate says no.

Common questions

What is "open-to-buy"?

The cash that's genuinely free to become stock: capital, minus what's already on the shelf at cost, minus what's reserved for postage, supplies and anything else you set aside.

Is this a promise of what will happen?

No — a forecast is a guess built from your own averages. Its value is that you can put each real week beside it and see which assumption was wrong. That's when it starts paying for itself.

This forecast comes from a book.

It's chapter 6 of Reselling — Advanced: the eight-week forecast and the gates that say no before you're tempted.

See the Reselling series →