solve it spicaly qustion E I want explan how I can solve it

The City Taxi Company uses 200,000 liters of diesel fuel per year at a constant rate. It costs 50 OMR to process the orders, invoices, inspections and completion of delivery for each time the company places an order from its supplier, Southern Oil. The taxi company pays 0.2 OMR per liter for the diesel fuel. Holding costs due to evaporation losses and other storage costs are 40%. The lead time for the diesel order is 2 days. Assume 350 days per year. (a) How many liters of diesel should the taxi company purchase with each order? 7071.0 10,000 15.811.4 11.180.3 (0) The Taxi Company has found another supplier, Northern Oil, who will offer quantity discounts according to the schedule shown below. The lead time from this supplier is also 5 days: Quantity purchased Price (OMR / liter) 1-9999 liters 0.200 10000 - 29999 liters 30000 - 49999 liters 0.195 50000 liters or more 0.193 0.197 If the Taxi Company uses this supplier (Northern Oil), then the optimal order quantity (in liters) is: 30,000 50,000 16,012.8 16,137.4 15.931.2 (d) If the Taxi Company management decide they will place an order just once every 3 months from Northern Oil, then then the total annual cost will be 40.503.3 OMR 40,655.4 OMR 41,340 OMR 42.240 OMR 40,730 OMR Time left 0:37:45