Assume (1) the quantity of materials purchased equals the quantity used in production, (2) the materials spending variance is $400 unfavorable, and (3) the materials quantity variance is $200 favorable. Given these assumptions, which of the following statements is true? Multiple Choice The materials price variance must be $200 unfavorable The materials price variance must be $600 favorable The materials price variance must be $600 unfavorable Multiple Choice O The materials price variance must be $200 unfavorable The materials price variance must be $600 favorable The materials price variance must be $600 unfavorable. The materials price variance mus de $200 favorable