Filimonov Inc. has the following information related to purchases and sales of one of its inventory items: Refer to the information for Filmonov Inc. and assume that the company uses a perpetual inventory system. This information has been collected in the Microsof Excel Online file. Open the spreadsheet, perform the required analysis, and input your answers in the question below Required: Caiculate the cost of goods sold and the cost of ending inventory uaing the LFO inventory costing method