Keck Co. had 300 units of product A on hand at January 1, 2017, costing $21 each. Purchases of product A during January were as follows:Date Units Unit CostJan. 10 400 $2218 500 2328 200 24A physical count on January 31, 2017 shows 400 units of product A on hand. The cost of the inventory at January 31, 2017 under the LIFO method isa. $9,400.b. $8,900.c. $8,500.d. $8,200.