It BIC-D is a company which manufactures bottles made from polyethylene terephthalate. The company stores these bottles in boxes at two storage facilities: Gen land Gen 2 and the bottles are sold by the box. Gen I currently has EDDIE boxes whilst Gen 2 has [500 boxes. BICD supplies ve retailers with bottles. The orders placed by these five retailers are shown in Table l. The shipping costs from each storage facility to the retailers are given in Table 2. RICE) would like to determine the most cost elfectiye way to deliver the boxes to the retailers from its two storage facilities. It should be noted that the retailers are willing to purchase additional boxes once their order is fulfilled. ----- From/To Shipping Cost ($/box) Retailer 1 Retailer 2 Retailer 3 Retailer 4 Retailer 5 Gen1 13 14 15 10 11 Gen 2 13 13 15 9 12 Formulate the optimisation model and clearly define all decision variables used, DO NOT SOLVE. (8 marks)