The Rock Shop shows the following data related to an item of inventory: Inventory, January 1 100 units @ $5.00 Purchase, January 9 200 units @ $5.40 Purchase, January 19 100 units @ $6.00 Inventory, January 31 200 units (a) What value should be assigned to the ending inventory using FIFO? (1 mark) (b) What value should be assigned to cost of goods sold using Average Cost? ( 1 mark)