the following information relates to production activities of mercer manufacturing for the year. actual direct materials used 17,800 pounds at $4.95 per pound actual direct labor used 18,435 hours at $37 per hour actual units produced 33,600 standard quantity and price per unit for direct materials 0.50 pound at $4.90 per pound standard quantity and rate per unit for direct labor 0.50 hour at $38 per hour ar