2. START Corporation makes the following purchases and sales. 1 January Purchases 4,000 units for $10,000 31 January Purchases 1,000 units for $2,000 15 February Sales 3,000 units for $13,000 28 February Purchases 1,500 units for $3,750 14 March Sales 500 units for $1,200 a) If the company uses FIFO method what is the closing valuation at 31 March? b) If the company uses AVCO method what is the closing valuation at 31 March?