Based on the following information, calculate the cost of goods sold and ending Inventory using RFO, LIFO, and weighted average assuming a perpetuat inventory system is in place Beginning Balance - 100 units at $9 March 5 - Purchase 250 units for 517 April 6. Sell 200 units for 538 June 30 - Purchase 300 units for $21 August 16 - Sell 180 units for $40