Sunland Marine Products began the year with 10 units of marine floats at a cost of $12.60 each. During the year, it made the following purchases: May 5, 30 units at $18.40; July 16,15 units at $22.20; and December 7.20 units at $27.00. Assuming there are 25 units on hand at the end of the period, determine the cost of goods sold under (a) FIFO, (b) LIFO, and (c) average-cost. Sunland uses the periodic aporoach. Sunland Marine Products began the year with 10 units of marine floats at a cost of $12.60 each. During the year, it made the following purchases: May 5, 30 units at $18.40; July 16,15 units at $22.20; and December 7.20 units at $27.00. Assuming there are 25 units on hand at the end of the period, determine the cost of goods sold under (a) FIFO, (b) LIFO, and (c) average-cost. Sunland uses the periodic aporoach