Kwimba Kati agricultural cooperatives in Chinsali purchases bean storage chemicals to sell to its members at reduced prices. The cooperative buys these chemicals from Plant Agrichem Services Limited in Lusaka. The supplier quotes a price of K0.9 per bottle for orders less than 500, K0.85 per bottle for orders of 500 to 999 bottles, K0.80 per bottle for orders of 1000 bottles or more. It costs approximately K30 to prepare an order and receive it, annual carrying cost per unit is 40% of purchase cost while annual usage is 4,000 bottles. (a) Determine an order quantity that will minimize the total inventory cost. [10 marks) (b) Suppose the cooperative is open for 300 days in a year and it takes 7 days on average for it to receive its orders, determine the reorder point. [4 marks] (c) List the major assumptions of an economic order quantity model? - [6 marks]