harmony co. estimated that 84,000 labor hours would be worked during the upcoming period, while 78,400 hours were actually worked. harmony estimated that overhead would be $1,260,000 while actual overhead was $1,218,000. how much is the overhead application rate if harmony bases it on direct labor hours (if necessary, round your answer)? $15.54 per hour $16.07 per hour $15.00 per hour $14.50 per hour