Need help creating a function with loop.

This one has been giving me a lot of trouble. I'm trying to create a function that uses two input values selected in a userform to produce a desired output (please see attachment). The problem I'm having is that I'm creating a separate function for each "dynamic variable" and so I've got 25 output values when I'd like to have only one. Is this possible? My guess is that a loop needs to be created with different step values (I just don't know how to do that).
Any help is greatly appreciated.
Gabe