8-34 Flexible-budget variances, review of Chapters 7 and 8. Michael Roberts is a cost accountant and business analyst for Durby Design Company (DDC), which manufactures expensive brass doorknobs DDC uses two direct-cost categories: direct materials and direct manufacturing labor. Roberts feels that manufacturing overhead is most closely related to material usage. Therefore, DDC allocates manufacturing overhead to production based upon pounds of materials used. At the beginning of 2017, DDC budgeted annual production of 410,000 doorknobs and adopted the fol lowing standards for each doorknob: Input 0.3 lb. $9/b. 1.2 hours $16/hour Cost/Doorknob $ 270 19 20 Direct materials (brass) Direct manufacturing labor Manufacturing overhead: Variable Fixed Standard cost per doorknob $4/b. x 0.3 lb. $14/1b. X 0.3 lb. 1.20 4.20 $27.30 Rooted Actual results for April 2017 were as follows: Production 32,000 doorknobs Direct materials purchased 12.900 th. at $10/16 Direct materials used 9,000 lbs. Direct manufacturing labor 29,600 hours for $821,800 Variable manufacturing overhead $ 54,900 Fixed manufacturing overhead $160,000 1. For the month of April, compute the following variances, indicating whether each is fuvorable (F) or unfavorable (U): - Direct materials price variance based on purchases) b. Direct materiais efficiency variance c. Direct manufacturing labor price variance 4. Direct manutacturing labor efficiency variance 2. Variable manufacturing overhead spending variance t Variable manufacturing overhead efficiency variance Production-volume variance h. Faced manufacturing overhead spending variance 2. Can Roberts use any of the variances to help explain any of the other variances? Give examples