Peter Co uses a periodic inventory system and purchases (use 4 decimal points for unit cost) for the month of August were: Date Units Unit cost $ Beginning Inventory 1-Aug 2800 2.8361 Purchase 10-Aug 7000 3.6895 Purchase 21-Aug 2500 4.248 Purchase 29-Aug 5100 4.2969 Sales during the year were 12400 units. Peter Co uses the LIFO assumption with the periodic inventory method. The value of the cost of sales is