Ahh okay, I have a worksheet that gives an income statement - Gross profit and sales (revenue) are blank, but everything inbetween is there, I have no idea how to work it backwards to find sales.
Wowwww, disregard all this. I figured it out, it's those income statement layouts with the working on one side, and the product of the sums on the other. Just-after-school-temporary-braindeath condition.