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 6 hours of tabor at a standard wage rate of $10.8. During July. Regent Corporation produced 3.200 units. Materials purchased and used totaled 10,300 pounds at a total cost of $142,913. Payroll totaled $148.780 for 23.150 hours worked. Required: a. Calculate the direct materials price variance. Notes 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 materials quantity variance. Note: Indicate the effect of varlance by selecting "Favorable", "Unfavorable", or "None" for no effect (i.e., zero variance). c. Calculate the direct materials spending variance. Note: Indicate the effect of variance by selecting "Favorable", "Unfavorable", or "None" for no effect (l.e., zero variance)