Problem IV (12 points) SJB Inc. estimated overhead for 2020 would be $378,000 and also estimated machine hours for the same period would be 120,000 hours. During January SJB incurred $30,000 of overhead and 9,500 machine hours. Job 249 was completed with $1,500 of material, $2,400 of labor and 620 machine hours. Determine the following 1. Predetermined Overhead Rate 2. The balance of the Overhead account at January 31 (amount and over/under) 3. The cost of Job 249