HP -01 Owner's Manual page 53

effortless with your HP-01 because the calculator retains the base amount while you add or
subtract percents. The procedure is:
(base amount) @ or @ (percent number) @ ©
For example, if the sales tax on a $8550 car is 5%, what is the amount of the tax and the
total cost of the car?
Press Display
000600060 421.5 . Sales tax amount.
e g971.5 Net amount (total cost).
If the dealer gives you a 10% discount on the car, what will the cost (including sales tax) be?
Press Display
Using the Calculator 51