Assuming the "A" of table A is in cell A1, the "B" of table B is in cell A6
and the "C" of table C is in cell F6, try this formula for the a sum:

=SUMPRODUCT(B7:D7,G7:I7,(B2:D2="Yes")*1)

and copy it down one row for the b sum. This produced 16 in both cases for
me.

--
Jim
"laandmc" wrote in message
...
|I have a problem where I want to times some cells together if certain
| conditions are satisfied. Tables A has the conditions in, tables B and C
have
| the information I want to times together, and the bottom two tables have
what
| I want as an outcome, the left table showing the sums I want to do (note I
do
| not want to see this table in what Im doing it is just for examples
purposes)
|
| If the table A has a yes in its cell I want the two respective cells in
| tables B and C to be times together and added to any other respective
cells
| that are in the same row.
|
| Any help would be appreciated.
|
| A jan feb mar
| a yes yes
| b yes yes
|
| B jan feb mar C jan feb mar
| a 1 2 3 a 6 5 4
| b 4 5 6 b 3 2 1
|
| totals totals
| a = 1*6 + 2*5 a 16
| b = 5*2 + 6*1 b 16
|