PLEASE SHOW WORK

Bramble Corp. had 340 units of product A on hand at January 1, 2017, costing $20 each. Purchases of product A during January were as follows: Date Units Unit Cost Jan. 10 450 18 520 28 180 $21 23 A physical count on January 31, 2017 shows 430 units of product A on hand. The cost of the inventory at January 31, 2017 under the LIFO method is $8690 O $9640 O $9090 $8390