During October, Tedesco company sold 240 unit of product R. It's beginning inventory and purchases during the month were as follows:

Oct 1 beginning inventory 100 units @ $20 oct 5 purchases 100 units @ $24 oct 10 purchases 100 units @ $22 oct 15 purchases 100 @ $24 oct 20 purchases 100 units @ $28 oct 25 purchases 100 units @ $26 Compute the cost of goods sold under each of three methods: a: average cost, b:LIFO and c: FIFO. Assume the periodic inventory system is used.