how do i calculate the cost of sale?

Required information Use the following information for the Exercises 3-7 below. (Algo) [The following information applies to the questions displayed below.] Laker Company reported the following January purchases and sales data for its only product. The Company uses a perpetual inventory system. For specific identification, ending inventory consists of 280 units from the January 30 purchase, 5 units from the January 20 purchase, and 15 units from beginning inventory, Exercise 5-4 (Algo) Perpetual: Journalizing transactions LO P1 Record journal entries for Laker Company's sales and purchases transactions. Assume for this assignment that the company uses a perpetual inventory system and FIFO. All sales and purchases are made on account, and no discounts are offered. Journal entry worksheet Note: Enter debits before credits