"carolyn" wrote:

I am making an invoice and I have many lines blank under "hours". I made one
cell with the hourly rate. I then put in the product funtion in te amount
own as the hourly rate cell times the hours work to get the amount for the
amount of that one job description. that works great. the problem is when I
have unused columns, the hour column should be blank, and I want it to be
blank. But what happens is amount own mutiplies the hourly rate by one. It
should be zero. how can i make blank cells to equal zero, and NOT one??

Set the formula with the IF worksheet function ie. =if(B4="","",C4*B4)
B4 = Hour worked, B4 = Hourly rate