MS Excel 2003: Use an array formula to sum values in Column A when value in Column B and Column C match criteria

Question: In Microsoft Excel 2003/XP/2000/97, I need to create a formula that will sum all the values in Column A when the value on the same row in Column B is 150 and the value in Column C is the letter U.

Answer: This can be done in Excel with an array formula.

Let's look at an example.

In cell A7, we've created the following array formula:

=SUM((A1:A5)*(B1:B5=150)*(C1:C5="U"))

When creating your array formula, you need to use Ctrl+Shift+Enter instead of Enter. This creates {} brackets around your formula as follows:

{=SUM((A1:A5)*(B1:B5=150)*(C1:C5="U"))}