please answer me fast i have exam

1. A local electronic repair shop uses 12,500 units of mobile batteries each year. It costs RO 25 to place and receive an order. The cost of material is RO 16 per unit and carrying cost is 10% of the cost per unit. Calculate the Economic Order Quantity for the shop, number of orders and total inventory costs. 2. Al Wardi marketing company purchases mobiles directly from manufacturers and sells it to small retailers. The following transactions occurred during 2020: January, 12": 75 mobiles on hand @ RO 30 each March, 21st: 80 mobiles purchased @ RO 40 each. May, 14th: 120 mobiles purchased @ RO 50 each. July, 10h: 80 mobiles purchased @ RO 60 each. September 16th: 50 mobiles purchased @ RO 80 each During 2020 Al Wardi company sold 300 mobiles. Required: Compute the Cost of Inventory sold and the value of closing inventory during 2020 under the following cost inventory methods. (a). First in, first out (FIFO) (b). Last in, first out (LIFO) (c) Average cost method