Exercise 6. A company's inventory records indicate the following data for the month of April: April 1 April 5 April 9 April 14 April 20 April 30 Beginning Purchase Sale Purchase Sale Purchase 350 units at $18 each 290 units at $20 each 500 units at $55 each 250 units at $22 each 200 units at $55 each 240 units at $25 each Compute inventory and cost of goods sold in a perpetual system using the methods of FIFO, LIFO, and weighted average