How many different three-letter initials are there that contain at least one a?

Student representatives surveyed their classmates on their preference of a school mascot for a new school. the results are shown in the table below. which pair of samples seems most representative of student preference?

Iknow the answer but the calculator doesn't seem to give the right one

Build is 120 wide 20 feet high 48 feet long how many cubic feet and the volume