Show necessary calculation and values for (a), (b), (c), and (d) in the provided space below.

Hint: For (a), (b), (c), consider the required constraints would help.

Rent'R Cars is a multi-site car rental company in the city. It is trying out a new "return the car to the location most convenient for you" policy to improve customer service. But this means that the company has to constantly move cars around the city to maintain required levels of vehicle availability. The supply and demand for economy cars, and the costs of moving these vehicles between sites, are shown as follows: From / To D E F G Supply A $9 $8 $6 $5 50 B $9 $8 $8 $0 40 C $5 $3 $3 $10 75 Requirements 50 60 25 30 165 The following is the optimal solution that minimizes moving costs using linear programming transportation method in Excel. Find the missing values for (a) (b), (c), and (d): Optimal Solution Total shipped A 25 0 25 (a)? 50 B 10 0 0 (b)? 40 15 60 0 (c)? 75 Total Supplied 50 60 25 30 165 Cost calculation A 225 0 150 ? B 90 0 0 ? 75 180 0 ? Total Costs $(d)