# Using HP 10bII for Markups and Margins

Q1: Find the margin if cost is $15.00 and selling price is $22.00?

Keystrokes:

15 [CST]

22 [PRC]

[MAR]

A1: After pressing [MAR] it display 31.81, this is the margin.

Q2: If cost is $20.00 and markup is 33%, what is the selling price?

Keystrokes:

20 [CST]

33 [MU]

[PRC]

A2: After pressing [PRC], it calculates and display the selling price, which is 26.20.

This solution is also applicable to HP 10b Financial Calculator.