HP 10bii+ Margin/Markup bug

[Rick314]

(04-01-2021 12:55 PM)Gamo Wrote:  ... HP-18C Business Consultant ...
Example: Using shared variables
Part 1. Cost = 9.60 Markup = 15% What is the Price?
Part 2. What is the markup on price (Margin)?

Thank you Gamo, but this is the same as the 17BII and demonstrates the same problem that started this thread. It can't solve all 12 mathematically possible input-output scenarios without doing a required entry-solve sequence ("Part 1", "Part 2") and finding intermediate values that are sometimes unnecessary. The HP 200LX HP CALC Solver solution given 3/27/21 converts from 15% Markup to 13.04% Margin directly (no need for Cost or Price at all), or any other mathematically possible from-to situation: Enter Markup and Cost, Solve for Price (and you get Margin too); Enter Markup and Cost, Solve for Margin (and you get Price too); ... 12 scenarios total. All HP calculators could have done this, but none do so.