Flex uses the FIFO pricing method to determine the value of its inventory. What amount should Flex report as cost of goods sold on its income statement for the month of January? 1/1 Beginning Inventory 10,000 units at $3 1/5 Purchase 5,000 units at $4 1/15 Purchase 5,000 units at $5 1/20 Sales at $10 per unit 10,000 units Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a $30,000 b $37,500 $45,000 $100,000