LuCo begins operations in 20X4 and uses the periodic method and LIFO costing. Its merchandise purchases are as follows:

	20X4	20X5	20X6
March	300 @ $4	600 @ $8	900 @ $11
July	500 @ $5	900 @ $12	600 @ $14
September	200 @ $7	100 @ $9	700 @ $13
November	400 @ $6	700 @ $10	100 @ $16

Assume, instead, that LuCo's December 31, 20X4 ending inventory is 300 units; its December 31, 20X5 ending inventory is 800 units; and its December 31, 20X6 ending inventory is 600 units (which is lower than its 20X6 beginnig inventory). What is LuCo's December 31, 20X6 ending inventory?