4. An unfavorable materials quantity variance could have resulted from a. Prices paid including how many units are ordered. b. How the order is delivered. c. whether the order is a rush order. d. the quality of the materials. 5. The use of poor quality materials could affect the following variances a. material quantity variance. b. labor efficiency variance. c. variable overhead efficiency variance. d. all of the above. 6. Which department should usually be held responsible for an unfavorable materials price variance? B. Materials Handling. C. Engineering. D. Purchasing