Laker Company uses a perpetual inventory system and reported the following January purchases and sales data for its only product. Date Activity Units Info Jan 1 Beginning Inventory 140 units @ $6.00 = $840 Jan 10 Sale 100 units Jan 20 Purchase 60 units @ $5.00 = $300 Jan 25 Sale 80 units Jan 30 Purchase 180 units @ $4.50 = $810 Jan 31 Ending Inventory 200 units @ ? Required: What is the total cost of Goods Available for Sale