A company has 3 production facilities. S1, S2, and S3 with a production capacity of 7,9 and 18 unit (hundredth) per week of a product respectively. These unit have been shift to four warehousing D1, D2, D3, D4 with requirements 5,8,7 and 14 unit hundredth per week respectively. The transportation cost in dollars per unit between factories to warehouses are given in the table below: