A computer hardware seller sells branded personal computers (PCs). It costs the store $450 each time it places an order with the manufacturer for the PCs. The annual cost of carrying the PCs in inventory is $170. The estimated annual demand for the PCs is 1,200 units. a. Determine the optimal order quantity and the total minimum inventory cost. (2) b. Assume that shortages are allowed and that the shortage cost is $600 per unit per year. Compute the optimal order quantity and the total minimum inventory cost. (2) c. Draw suitable plots to explain your answer d. In a two minute video recording, explain the concept of EOQ in your own words (2)