Answer:
c. $6,500. 
Step-by-step explanation:
The computation of the material cost assigned to Job 971 is as follows:
= Budgeted Overhead × Material Weight for Job 971 ÷ Total Weight 
= $160,000 × 130 ÷ 3200 
=$6,500
Hence, the material cost assigned to Job 971 is $6,500
Therefore the correct option is c.