The decision variables are: Xop tons of product p to be manufactured at origin o, for each o E O and pe P Youp tons of product p to be shipped from origin o to destination d, for each o E O, d ED and p EP A linear programming formulation for this situation can be written as follows: Minimize DEO EpEP Cop Xop + Loco EdED EpEP dodp Youp Subject to Epep(1/Top) Xop