You can use either SUM or SUMPRODUCT. When you use SUM you need the equal
sign and DON'T type the Curly bracket. These must be enter by typying Shift-
Cntl- Enter



"Eric" wrote:

Yes, sorry B1 should have been B2 in my question, but still need help on this.

"Joel" wrote:

Change B1 to B2

"Eric" wrote:

Wondering if there is a way to use an array formula for this?

I'm trying to multiply data for several months (data arranged in columns) by
values contained in one column. In the example below I want to multiply .5
by 100, 125 and 75, .7 by 100, 125 and 75, etc. Then take the sum of these
products. I was thinking {sum(b1:d6*a2:a6)} would work, but it returns an
error.

Multiplier Jan Feb Mar
0.5 100 125 75
0.7 100 125 75
0.9 100 125 75
0.4 100 125 75
0.3 100 125 75


Any help on this is greatly appreciated.

Thanks