Formula with blank cells
 

Sheeloo provides a solution covering all cases. If the only possible entries
in D3 are A, G or S, then it could be simplified to just:
=IF(D3="A",C3 * E2),"")
Basically this one says to provide value of C3 * E2 only when D3 = "A" - any
other entry in D3 results in nothing displayed in E3.

"George" wrote:

Excel 2007
In a cost spreed sheet I need to set up a formula that will allow me to
change one cell to effect three different cells;
If D3 = A, then E3 = the sum of C3 x E2, if D3 = G or S, then E3 must remain
blank