Hello again!

I am creating a IF(... formula, here is what i have so far...

=IF(B3='Max' AND C3='Sell', D3-J17,0)

I have two drop down boxes, one at B3 and one at C3, i want to D3-J17, but only when B3 = Max and C3 = Sell, otherwise 0 (really instead of 0 im gonna add in more formula for the rest of the drop downs, but for arguments sake lets say 0), what do i do?

Thanks!
Max