i need help with number 1, the rate variance, efficiency, and total variance.

Labor Variances Cinturon Corporation produces high-quality leather belts. The company's plant in Boise uses a standard costing system and has set the following standards for materials and labor: Leather (3 strips @ $4) $12.00 Direct labor (0.75 hr. @ $12) Total prime cost 9.00 During the first month of the year, Boise plant produced 92,000 belts. Actual leather purchased was 287,500 strips at $3.60 per strip. There were no beginning or ending inventories of leather. Actual direct labor was 78,200 hours at $12.50 per hour. $21.00 Required: 1. Break down the total variance for labor into a rate variance and an efficiency variance using the columnar and formula approaches. Rate variance X Efficiency variance Unfavorable Unfavorable Unfavorable Total variance 2. CONCEPTUAL CONNECTION As part of the investigation of the unfavorable variances, the plant manager interviews the production manager. The production manager complains strongly about the quality of the leather strips. He indicates that the strips are of lower quality than usual and that workers have to be more