[5] Jumbo's year end stocks at 31/12/x2 are 10,000, he has 100 units in store and he bought inventories as shown below. Average selling prices were 115 per unit. His gross profit was: Date Volume/Bought Price/Unit Jan-X2 100/90 Jun-X2 100/100 Dec-X2 100/110 A.. 2,000 2,500 C... 3,000 D... None of these