I am trying to get a formula to return a number if two other cells have
values. Column X might have a number or a letter; Column Y will have a
number. For a particular line, if there is something in Column X and Column
Y, I want it to return the value of the number in column Y. I can do this
with a simple IF function, but the problem I'm having is that I need the cell
to add the value of every line where there is something in Column X and
Column Y. I tried making an array formula but it did not work:
=SUM((ISLOGICAL(H20:H403))*(ISLOGICAL (M20:M403))*(M20:M403))
Help!

Cynthia