Lannister Inc. holds 12,000 units of inventory on January 1, 2017. Under FIFO (first-in, first-out) the inventory lot costs are: Inventory Lot Date Units Cost / Unit Total Cost H 12/13/2016 6,000 $120 $720,000 I 12/22/2016 6,000 $125 $750,000 Under LIFO (last-in, first-out) the same inventory has the following lot costs: Inventory Lot Date Units Cost / Unit Total Cost A 4/22/2012 2,000 $60 $120,000 F 10/15/2014 4,000 $84 $336,000 I 12/22/2016 6,000 $125 $750,000 Under average cost the same 12,000 inventory units have a total cost of $1,320,600. During January 2017, Lannister records the following transactions (in chronological order): Sells 7,000 units of inventory with revenue of $175 per unit. Purchases 4,000 units of inventory at a cost of $130 per unit. Sells 2,000 units of inventory with revenue of $180 per unit. Purchases 3,000 units of inventory at a cost of $132 per unit. Sells 2,000 units of inventory with revenue of $184 per unit. Counts ending inventory units of 8,000 units on January 31. In answering the following questions, assume that Lannister uses a periodic inventory system. Do not include a $ with any of your answers. Unless otherwise instructed, enter your answers as whole numbers. How many units of inventory did Lannister have available for sale during the month of January