InfoPath Dev

I started out with a simple formula to add to fields in my InfoPath form;

(CurrentDriveCapacity) + (CapacitytoAdd)

How can I change the operation of adding the two fields to subtracting one from the other based on a setting of another field?

Hi Joe920,

One solution I can think of is by creating two hidden fields with different operations that runs and sets another field to show a result if a certain condition has been met.

Example:

field A + field B = field E

field C contains the formula A + B
field D contains the formula A - B

Rule 1:
Condition: if field B > X
Action: Set field E to the value of C.

Rule 2:
Condition: if field B < X
Action: Set field E to the value of D.