Please provide the accurate answer to this general accounting problem using valid techniques.

Silver Spoon Catering assigns overhead to specific jobs based on direct labor hours. At the beginning of the current year, estimated overhead costs were $600,000 and estimated direct labor hours were 50,000 hours. By the end of the year, actual overhead costs were $615,000 and actual direct labor hours were 55,000 hours. A. Calculate the predetermined overhead rate. B. How much overhead would be applied to a catering job that required 20 direct labor hours? C. How much total overhead was applied during the year? D. By how much was overhead over- or underapplied for the year