Graduating students from a certain high school sold cinema tickets on two different occasions, in two kebeles, in order to raise money that they wanted to donate to their school. The following matrices show the number of students who attended the occasions.
a. Give the sum of the matrices.
b. If the tickets were sold for Birr 2.50 a piece on the 1st occasion and Birr 3.00 a piece on the second occasion, how much money was raised from the boys? from the girls? In kebele 1. What is the total amount raised for the school?