A logistics specialist for Wiethoff Inc.must distribute cases of parts from 3 factories to 3 assemblyplants. The monthly supplies and demands, along with the per-casetransportation costs are:

Destination Assembly Plant 1 2 3 Supply Source A 5 9 16 200 Factory B 1 2 6 400 C 2 8 7 200 Demand 120 620 60

1. formulate the above problem mathematically.
2. what is the value of the optimal objective function value?