The following data pertains to the Chue Machining April results: Standards Actual Results Quantity Cost Cost Direct Materials 4.0 pounds/unit $24 / pound $26 / pound totaling $94,380 Direct Labor 5.0 hour / unit $40 / hour $42.50 / hour totaling $149,175 Units 850 ---- 825 units a. Calculate the direct materials price and efficiency variances. b. Give a possible explanation for the cause of the materials price variance. c. Calculate the direct labor price and efficiency variances. d. Give a possible explanation for the cause of the labor efficiency variance.