Pricing Calculator for HP Prime

[Gamo]

Without knowing either S or C that will be impossible to find A or U
Possible Known Variables must be in these combinations
S and C --> look for A and U
S and A --> look for C and U
S and U --> look for C and A

C and A --> look for S and U
C and U --> look for S and A

A and U --> Can not look for S and C