Using Average Method calculate the Cost of Goods Sold:

1/1/98 beginning inventory 3,000 units cost $15 each

1/14/98 purchased 1,000 units cost $18 each

1/18/98 purchased 1,500 units cost $21 each

1/25/98 purchased 2,000 units cost $23 each

at 1/31/98 we have 2,600 unit remaining in inventory. (if needed round to the cents, do not round to the dollar!!)