Excel formula?

you double click on C2. Once inside, write the following:

=B2–15 (instead of writing B2, you could also click on the actual cell B2)

Then click Enter

Then move the mouse over the lower right corner of C2, and once it turns into a +, use it to drag the box until C32

hope that made sense…

This might help.

Fill out the formula for C2 and click on that and drag down to select all the cells you want that formula to apply to. Then Edit—> Fill—> Down

Yep both answers got the job done. ¡Gracias!