Krizum Industries makes heavy construction equipment. The standard for a particular crane calls for 13 direct labor-hours at $27 per direct labor-hour. During a recent period 1,170, cranes were made. The labor rate variance was zero and the labor efficiency variance was $17,820 unfavorable. How many actual direct labor-hours were worked? 14,770 15,870 O 30,120 O 15,210