Friends sons show the following transaction show the purchases and sales of merchandise during the year:

Jan. 1 Balance on hand, 1,000 Units Rs.12/per unit

Jan.5Purchase, 1,200 units, Rs.13 /per unit

Jan. 8 Sale, 1,500 units Rs.18/per unit

Jan15Purchase 2,000 units Rs.14/per unit

Jan.18Sale, 1,800 units, Rs.20/per unit

Jan.25Purchase, 3,000 units Rs.15/per unit

Jan.26Sale, 1,200 units, Rs.21/per unit

Jan. 30Purchase, 2,500 units Rs.16/per unit

Jan.31Sale 2,100 units Rs.22/per unit

Required:Compute the cost of ending inventory under the perpetual system on Jan 31, 2011 using the following methods:

a.First In First Out (FIFO)

b.Last In First Out (LIFO)

c.Average method