Pricing Calculator for HP Prime

[Gamo]

I saw some Financial Calculator included the Pricing Calculation Functions such as Cost, Selling Price, Margin and Markup. So I try to put this in HP Prime by using there formulas on the Solve App. I put two formulas 1. Cost 2. Selling Price two formulas together can not be solve at the same time have to select one at the time to find Markup and another to find Margin. Its doesn't work like a Triangle Solver App where you can input any three data to find the other results.
Any ideas on how to do this by using Solve App without using Program.

Thank You.