Saved SpinMi Corp. uses a standard cost system. Standards are 4.0 sheets of inch nickel at $110 per sheet and 141 hours of taborat a standard wage rate of $13. During July, the company manufactured 610 units. Materials purchased and used totaled 2,580 sheets at a total cost of $271,550. Payroll totaled $113,000 for 8,780 hours worked. a. Calculate the direct materials price variance. (Do not round your intermediate calculations. Indicate the effect of variance by selecting "Favorable", "Unfavorable", or "None" for no effect (l.e., zero variance).) Price Varance b. Calculate the direct materials quantity variance. (Indicate the effect of variance by selecting "Favorable": "Unfavorable", or "None for no effect (i.e., zero variance).) Quantity Variance c. Calculate the direct labor rate variance. (Do not round your intermediate calculations. Indicate the effect of variance by selecting "Favorable". "Unfavorable", or "None" for no effect fi.e., zero variance).) Rate Variance d. Calculate the direct labor efficiency variance (Indicate the effect of variance by selecting "Favorable "Unfavorable", or "one" for no effectie., zero variance).) Emcency Variance