Cheap 0/ 1 pts Red Buttons uses a periodic inventory system with the weighted average method of cost assignment. The following data are available. Date Units Unit cost 1 July Beginning inventory 1,200 $10 8 July Purchases 1,600 $5 21 July Purchases 2,000 $5 Sales 3,200 units Ending inventory 1,600 units The value of cost of sales is $ Use whole $ for your answer. 22000