Final answer:
The cost of goods sold for September is $1,081,600.
Step-by-step explanation:
The cost of goods sold for September can be calculated by subtracting the total manufacturing costs of the completed units from the total manufacturing costs of Job S80M. The total manufacturing costs can be obtained by summing up the direct materials, direct labor cost, and manufacturing overhead cost applied.
In this case, the total manufacturing costs of Job S80M are $715,500 + $668,700 + $779,100 = $2,163,300.
Since 40,000 units were completed and 20,000 units were sold, the cost per unit can be calculated by dividing the total manufacturing costs by the number of completed units: $2,163,300 / 40,000 = $54.08.
The cost of goods sold for September is simply the cost per unit multiplied by the number of units sold: $54.08 * 20,000 = $1,081,600.