Krizun Industries makes heavy construction equipment. The standard for a particular crane calls for 13 direct labor-hours at $15 per direct labor-hour. During a recent period 950 cranes were made. The labor efficiency variance was $4,500 Favorable. How many actual direct labor-hours were worked? O a. 11,900 direct-labor hours O b. 12,650 direct-labor hours c. 11,750 direct-labor hours d. 12,050 direct-labor hours e. 12.750 direct-labor hours