HP 10bii+ Margin/Markup bug

[Gamo]

I have noticed this ERROR too.

When input CST follow by MAR will not

return correct result if follow by MU directly.

CST, MAR → MU // Error
-------------------------------------------------
So I have try to program this Pricing Calculations to
various HP programmable calculators.

This program can calculate between MU and MAR and
almost any combinations of two input with only the exception is
the two input is MU and MAR will not give result for CST, PRC

Here is the link to my post

https://www.hpmuseum.org/forum/thread-15092.html

Gamo 3/24/2021