Bortello Corporation produces high-quality leather boots. The company has a standard cost system and has set the following standards for materials and labor: $240 Leather (12 strips $20) Direct labor (10 hours $12) Total prime cost $120 $360 During the year Bortello produced 125 boots. Actual leather purchased was 1,700 strips, at $16 per strip. There were no beginning or ending inventories of leather. Actual direct labor was 1,500 hours at $15 per hour Calculate the labor rate variance and the labor efficiency variance, respectively. Oa. $4,500 U and $3,000 U b. $4.500 U and $3,000 F Oc. $4.500 F and $3.000 F Od. $4.500 F and $3,000 U