Basil Tooling uses a standard cost system to account for the costs of its one product. Standards are 4 sheets of 1/2-inch steel at $110 per sheet and 14 hours of labor at a standard wage rate of $13. During July. Basil Tooling produced 600 units Materials purchased and used totaled 2,540 sheets at a price of $106. Payroll totaled $112,256 for 8,770 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 materials 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 labor rate 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). d. Calculate the direct labor efficiency variance. Note: Indicate the effect of variance by selecting "Favorable", "Unfavorable", or "None" for no effect (i.e., zero variance)