10 A restaurant has a main location and a traveling food truck The first matrix A shows the number of managers and associates employed The second matrix B shows the average annual cost of salary and benefits in thousands of dollars Complete parts a through c below Managers Associates 5 21 1 4 Restaurant Food Truck a Find the matrix product AB AB A Managers Associates Salary Benefits 7 42 20 4 B Simplify your answer b Explain what AB represents Choose the correct answer below OA Row 1 of AB represents the restaurant and row 2 represents the food truck Column 1 of AB represents total salary in thousands and column 2 represents total benefits in thousands for all employees OB Row 1 of AB represents the restaurant and row 2 represents the food truck Column 1 of AB represents total benefits in thousands and column 2 represents total salary in thousands for all employees OC Row 1 of AB represents the food truck and row 2 represents the restaurant Column 1 of AB represents total benefits in thousands and column 2 represents total salary in thousands for all employees OD Row 1 of AB represents the food truck and row 2 represents the restaurant Column 1 of AB represents total salary in thousands and column 2 represents total benefits in thousands for all employees c According to matrix AB what is the total cost of salaries for all employees managers and associates at the restaurant What is the total cost of benefits for all employees at the food truck The total cost of salaries for all employees at the restaurant is The total cost of benefits for all employees at the food truck is