Question 19 2.5 pts Which of the following could produce an unfavorable materials quantity variance? O lower-prade materials rather than top-grade materials were used in production causing defective jobs to be reworked higher skilled workers required less labor hours to complete a job O a higher quantity of materials were purchased resulting in the company receiving a discounted price from the supplier O required overtime work at premium rates to meet production requirements Question 20 2.5 pts Which of the following could produce an unfavorable labor efficiency variance? O poorly trained workers fewer units produced and sold than budgeted required overtime work at premium rates to meet production requirements high quality materials used in the production process