Q$1.$Willets Coffee Equipment sells European style coffee makers and uses a perpetual inventory system. Its inventory records show that on June $1,$ Joe Coffee had $12$ units on hand at a cost of $$220$ each. Transactions related to the purchase and sale of coffee makers in June were as follows: Per unitDateTransactionUnitsCostSales priceJune $10$Sale$3$ $$51015$ Sale$4$ $$51020$ Purchase$5$$$23022$ Purchase$6$$$24030$ Sale$10$ $$500$InstructionsFor each of the following cost formulas, calculate the ending inventory at June $30$ and the cost of goods sold for the month of June. Prove the cost of goods sold calculations.a$)$ FIFOb$)$ Weighted average $($Round to the nearest cent$)$