Bordeaux Corp., a French subsidiary of a US company, sells one product and uses a perpetual inventory system. The beginning the inventory consisted of 40 units that cost 2,000 per unit. During the current month, the company purchased: 240 units at 2,100 each. Sales during the month totaled 180 units for 4,350 each. What is the cost of goods sold using the LIFO cost flow assumption?