Explanation:
Single trip Truck Operating Cost = Distance \times Per mile Cost = 90×1.2 = 108
Single Round Trip Truck Cost Operating Cost = Single Trip Truck Operating Cost \times 2 = 108×2 = 216
Since, Single Round Truck trip takes 1 day and driver cost given in days, we can calculate the total cost by the following formula:
Single Round Truck Trip Total Cost = Single Round Trip Truck Cost Operating Cost + Driver Salary = 216 +275 = 491
Weekly Transportation cost to each manufacturing firm = No of Round Trip \times Round Trip Cost = 4×491 = 1964
Now, if each manufacturer send its truck twice a week and hauled the other firm's cargo on the return trip, then
New Weekly Transportation cost to each manufacturing firm = 2 \times Round Trip Cost = 2 × 491 = 982
So, Weekly saving = 1964 - 982 = 982