4. Keaton Accessories uses a perpetual inventory system. The companys beginning inventory of a particular product and its purchases during the month of January were as follows:

Quantity Unit Cost Total Cost

Beginning Inventory (Jan. 1).. 180 $50 $9,000

Purchase (Jan. 9). 90 55 4,950

Purchase (Jan. 21).. 90 56 5,040

Total.. 360 $18,990

On January 24, Keaton sold 200 units of this product. The other 160 units remain in inventory at January 31.

a. Determine the cost of goods sold using each of the following flow assumptions:

(1) LIFO $__________________

(2) FIFO $__________________

(3) Average cost $__________________

b. Determine the cost of the 160 units in inventory at January 31 using each of the following flow

assumptions:

(1) LIFO $__________________

(2) FIFO $__________________

(3) Average cost $__________________