Rent, utilities, insurance, software, loans, leases. Every fixed cost normalized to a monthly figure, told as a share of sales, with the number of days it takes to break even.
In the memo: Fixed costs run $14,903/mo — 13.1% of sales. You clear break-even on day 3.9 of the month; everything after is yours.
A weekly bill, an annual license and a quarterly lease all become one honest monthly number — by category, as a share of sales, with break-even in days. Add a cost once and it stays counted.

It's one of eleven modules, all in one login. Founding pricing while the wave is open.