HP 10bii+ Margin/Markup bug

[Rick314]

Thank you for the interesting HP-37E information Gamo. It shows another way HP handled the Price, Cost, Markup, Margin problem, but still not covering all possible input-solve combinations. The HP 200LX HP CALC solution given in this thread 3/27/21 handles all 12 possible cases:

Code:

Inputs          Solve For
=============   ===========
 4 CST  5 PRC   MU  (& MAR)
 4 CST  5 PRC   MAR (& MU)
 4 CST 25 MU    PRC (& MAR)
 4 CST 25 MU    MAR (& PRC)
 4 CST 20 MAR   PRC (& MU)
 4 CST 20 MAR   MU  (& PRC)
 5 PRC 25 MU    CST (& MAR)
 5 PRC 25 MU    MAR (& CST)
 5 PRC 20 MAR   CST (& MU)
 5 PRC 20 MAR   MU  (& CST)
25 MU           MAR
20 MAR          MU

As an example, I attached an image of what the 200LX display looks like after Clear Data, 4, CST, 25, MU, MAR. HP could have handled all 12 cases like this in their Cost-Price-Markup-Margin calculators but didn't.