Keystone pricing explained for online sellers: the doubling formula, a worked example, the margin it really delivers, its limitations, and when to use it.
How to calculate margin: use the formula Margin % = (Selling Price - COGS) / Selling Price x 100, with worked examples, margin vs markup, and a free calculator.
Margin vs markup: markup adds to your cost, margin is profit as a percent of the selling price. Get both formulas, worked examples and how to price right.