A manufacturing company applies factory overhead based on direct labor hours. At the beginning of the year, it estimated that factory overhead costs would be $367,308 and direct labor hours would be 40,812. Actual factory overhead costs incurred were $439,214, and actual direct labor hours were 50,835. What is the amount of overapplied or underapplied manufacturing overhead at the end of the year?

a.$18,301 underapplied

b.$457,515 overapplied

c.$90,207 underapplied

d.$18,301 overapplied