Final answer:
The prime costs during the month can be calculated by adding the direct materials and direct labor costs, which would be $78,700.
Step-by-step explanation:
The prime costs during the month can be calculated by adding the direct materials and direct labor costs. In this case, the direct materials cost is $47,300 and the direct labor cost is $31,400, so the prime costs would be $47,300 + $31,400 = $78,700.