Final answer:
To find the amount of direct materials charged to job 130, we divide the manufacturing overhead by the predetermined overhead rate and then multiply it by the percentage of the direct labor cost assumed to be the direct materials cost.
Step-by-step explanation:
In order to find the amount of direct materials charged to job 130, we need to use the predetermined overhead rate. The predetermined overhead rate is 80% based on direct labor cost. Therefore, if we know that the manufacturing overhead charged to job 130 is $5,000, we can calculate the direct labor cost for job 130 by dividing the manufacturing overhead by the predetermined overhead rate:
Direct Labor Cost = Manufacturing Overhead / Predetermined Overhead Rate
Direct Labor Cost = $5,000 / 0.80
Direct Labor Cost = $6,250
Now, we can assume that the direct materials cost is a certain percentage of the direct labor cost. Let's assume the direct materials cost is 60% of the direct labor cost:
Direct Materials Cost = Direct Labor Cost * Percentage
Direct Materials Cost = $6,250 * 0.60
Direct Materials Cost = $3,750
Therefore, the amount of direct materials charged to job 130 is $3,750.