Changing the Function Based on Inputs

[Whylucky]

I am stuck on a couple of problems but they generally boil down to 1 thing. Is it possible to have VBA change the function based on the inputs it receives? So if i have a " - " somewhere in my inputs it knows that it needs to run a different calculation? or even simply display the " - " in the answer box? Any help would be much appreciated. Thank you in advance.

 

[Whylucky]

that worked thank you