» Summing How Many Points Scored by a Specified Team in Specified Games

Problem:

Listed in columns A:C are the point totals scored by teams A and B in the first four games of the season.
We want to calculate the total number of points scored by Team B in the first two games.

Solution:

Use the SUM function as shown in the following Array formula:
{=SUM((A2:A9="B")*(B2:B9<=2)*C2:C9)}