Pricing Calculations for HP-12C

[Gamo]

For calculator like Casio that calculate Percent this way.

Example: To add 7% to 100

100 [x] 7 [%] display 7 [+] display 107

And calculator that have Constant Funtion that display [k] when press
arithmetic twice.

These keys steps also find various Pricing Calculations problem.

(Cost, Price) → Markup ►Cost [-] [-] Price [%]
(Cost, Price) → Margin ►Cost [-] Price [%]
(Cost, Markup) → Price ►Cost [x] Markup [%] [+]
(Cost, Margin) → Price ► Cost [+] Margin [%]
(Price, Markup) → Cost ► Price [+] Markup [+/-] [%]
(Price, Margin) → Cost ► Price [x] Margin [%] [-]

Also this can solve for the "Tax Exclusive" or Price without Tax

Example: Tax is 7% Price include tax is 100 What is price without tax?

100 [+] 7 [+/-] [%] display answer 93.46 [-] display tax amount 6.54

To check answer simply add them up 93.46 + 6.54 = 100

Remark:
Above calculations using the Casio MS-20UC

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