Answer:
Results are below.
Step-by-step explanation:
First, we need to calculate the number and cost of goods available for sale:
Number of units= 300 + 900 + 800= 2,000
Cost of goods available for sale= (300*19) + (900*17) + (800*20)
cost of goods available for sale= $37,000
FIFO:
Under the FIFO (first-in, first-out), the cost of goods sold is calculated using the cost of the firsts units incorporated into inventory.
COGS= 300*19 + 680*17= $17,260
Ending inventory= 37,000 - 17,260= $19,740
LIFO:
Under the LIFO (last-in, first-out), the cost of goods sold is calculated using the cost of the lasts units incorporated into inventory.
COGS= 800*20 + 180*17= $19,060
Ending inventory= 37,000 - 19,060= $17,940
Weighted-average:
Weighted-average cost= 37,000/2,000= $18.5 per unit
COGS= 980*18.5= $18,130
Ending inventory= 1,020*18.5= $18,870
Finally, the income statements for each method:
FIFO:
sales= (980*47)= 46,060
COGS= (17,260)
Gross profit= 28,800
Operating expenses= (18,700)
Net operating income= 10,100
LIFO:
sales= (980*47)= 46,060
COGS= (19,060)
Gross profit= 27,000
Operating expenses= (18,700)
Net operating income= 8,300
Weighted-average:
sales= (980*47)= 46,060
COGS= (18,130)
Gross profit= 27,930
Operating expenses= (18,700)
Net operating income= 9,230