4) In its first month of operations, Company has two transactions relating to inventory 5 January 15 January 50 units @ $50 each 75 units @$60 each Purchase Purchase Company uses the periodic inventory system. Company sold 100 units, of which 45 came from the 5 January purchase, and 55 came from the 15 January purchase. Calculate cost of goods sold and ending inventory, assuming a) specific identification, b) weighted average, c) FIFO, and d) LIFO