Three different high schools plan to order the same three te

Three different high schools plan to order the same three text books. School A plans to order 30 of book 1, 40 of book 2, 90 of book 3. School B plans to order 80 of book 1, 20 of book 2, 80 of book 3. School C plans to order 70 of book 1, 90 of book 2, 10 of book 3. The cost of book 1 is $15 per copy, the cost of book 2 is $20 per copy, and the cost of book 3 is $25 per copy. What matrix product displays the cost to each school of buying the textbooks? Display the two matrices which must be multiplied and their product.

Solution

From the known choices (B) and (C) are appropriate answers.