4. The following matrix represents the driving times (in hours) between the customers of a company that delivers product to them on a daily basis. The number of units to meet the daily requirement for each customer is also given:

418 Chapter 10A Management of Supply Chain Logistics Warehouses Fixed Customers Possible Costs 1 2 3 4 5 6 A 6 8 5 2 2 6 6 B 6 9 X 8 9 2 6 C 5 7 4 7 5 6 4 D 8 4 3 6 X 3 5 E 8 6 2 6 6 4 8 Note: X indicates no service is possible between warehouse and customer.

To Location D A B C D — 3 6 4 From A 3 — 8 5 Location B 6 8 — 3 C 4 5 3 —

Apply the add procedure to solve this warehouse location problem. Determine which warehouse should service each customer and indicate the total cost of your solution.