Price Formulas/Calculations:
To calculate the selling price or revenue R based on the cost C and the desired gross margin G, where G is in decimal form:
R = C / ( 1 - G)
The gross margin is the Profit divided by the selling price or revenue R
G = P / R
So, the gross profit P is the selling price or revenue R times the gross margin G, where G is in decimal form :
P = R * G
The mark up percentage M, in decimal form, is gross profit P divided by cost C.
M = P/ C
M * 100 will change the decimal to a percentage.