DPRODUCT

Database Functions:
Function: DPRODUCT() - Multiplies the values in a column of a list or database that match conditions that you specify.
Database

     +--------+--------+-----+-------+--------+
     | A      | B      | C   | D     | E      |
+----+--------+--------+-----+-------+--------+
|  4 | Tree   | Height | Age | Yield | Profit |
|  5 | Apple  | 18     | 20  | 14    | 105    |
|  6 | Pear   | 12     | 12  | 10    | 96     |
|  7 | Cherry | 13     | 14  | 9     | 105    |
|  8 | Apple  | 14     | 15  | 10    | 75     |
|  9 | Pear   | 9      | 8   | 8     | 77     |
| 10 | Apple  | 8      | 9   | 6     | 45     |
+----+--------+--------+-----+-------+--------+

Criteria

    +--------+--------+
    | A      | B      |
+---+--------+--------+
| 1 | Tree   | Height |
| 2 | =Apple | >10    |
+---+--------+--------+

The product of the yields of all Apple trees over 10' in the orchard
=DPRODUCT(A4:E10,"Yield",A1:B2)
DPRODUCT() Result is 140
Criteria

    +--------+
    | A      |
+---+--------+
| 1 | Tree   |
| 2 | =Apple |
+---+--------+

The product of the yields of all Apple trees in the orchard
=DPRODUCT(A4:E10,"Yield",A1:A2)
DPRODUCT() Result is 840