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Regent Corporation uses a standard cost system to account for the costs of its one product. Materials standards are 3 pounds of material at $14.00 per pound, and labor standards are 22 hours of labor at a standard wage rate of $92. During Juily, Regent Corporation produced 2,400 units. Materials purchased and used totaled 11,900 pounds at a total cost of $144,513. Payroll totaled $164,780 for 103,150 hours worked: Required: a. Calculate the direct materials price variance Note: Do not round your intermediate calculations. Indicate the effect of variance by selecting "Favorable", "Unfavorable", or "None" for no effect (i.e., zero variance). b. Calculate the direct materiais quantity variance. Note: Indicate the effect of variance by selecting "Favorable", "Unfavorable", or "None" for no effect (i.e., zero variance). c. Calculate the direct materlals spending variance. Note: Indicate the effect of variance by selecting "Favorable", "Unfavorable", or "None" for no effect (i.e,, zero variance)