ABC Manufacturing Inc. ends the month with two jobs still in progress. Job 5 has $10,000 of materials, $2,000 of direct labor and $8,000 of manufacturing overhead allocated. Job 6 was $30,000 of materials, $2,000 of direct labor and $10,000 of manufacturing overhead allocated. The cost of goods sold for the month was$40,000 and of that 30% was overhead. There were no finished goods in stock as the month ends. If the manufacturing overhead is underallocated by $10,000, which of the following choices would be the correct way to prorate it, assuming the proration is based on the allocated overhead in the ending balances of work-in-process, finished goods, and cost of goods sold? (Round any allocation percentages to one decimal place, X. X%.)

A. Job 6 should be allocated another $6,000 of cost
B. Job 5 should be allocated another $6,000 of cost
C. Cost of goods sold should be reduced by $4,000
D. Cost of goods sold should be increased by $4,000