County Stationers, Inc., had 200 calculators on hand at January 1, costing $45 each. Purchases and sales of calculators during January are presented in the following column: Purchases Date Jan. 12 Sales 150 @ $70 14 100 @ $50 29 100 @ $55 30 100 @ $80 County maintains a periodic inventory system. According to a physical count, 150 calculators were on hand at January 31. The cost of the inventory at January 31 under the FIFO method is $1,000 $7,750 $6,750 $8,000