Glasgow Enterprises started the period with 110 units in beginning inventory that cost $4.00 each. During the period, the company purchased inventory items as follows: Purchase Number of Items Cost 1 500 $4.50 2 450 $4.60 3 80 $5.00 Glasgow sold 580 units after purchase 3 for $7.80 each. What is Glasgow's cost of goods sold under FIFO