SUM

The SUM function adds all the numbers specified as arguments.

SUM(number1, [number2], [number3], [number4], ...)

• number1 (Required) is the first item that you want to add.
• number2, number3, number4, ... (Optional) are the remaining items that you want to add.

Example: SUM(ActualCost) returns the sum of the Actual Cost.