Muliple Choice Fields for Calculator

I’m trying to create a multi-facited product calculator. This requires selecting a couple of different product options and entering some values. I can’t seem to get more than one ‘choice’ component to work at a time.
Example of what I’m trying to do:
Select Product 1 from SheetA
Select Product 2 from SheetB
Enter Value 1
Enter Value 2

Then for the calculations, it would need to take certain values from each product with the entered values to find solution.

Thanks in advance for any help!

Can we have some screenshots of how you’re setting it up?