Nolan Mills uses a standard cost system. During May, Nolan manufactured 15,000 pillowcases, using 27,800 yards of fabric costing $3.05 per yard and incurring direct labor costs of $16,794 for 3,110 hours of direct labor. The standard cost per pillowcase assumes 1.75 yards of fabric at $3.10 per yard, and 0.20 hours of direct labor at $5.95 per hour. a. Compute both the price variance and quantity variance relating to direct materials used in the manufacture of pillowcases in May. (Indicate the effect of each variance by selecting "F" for favourable, "U" for unfavourable, and "None" for no effect (i.e., zero variance). Negative amounts should be indicated by a minus sign. Omit the "$" sign in your response.) Materials price variance $ (Click to select)NoneUF Materials quantity variance $ (Click to select)FNoneU -------------------------------------------------------------------------------- b. Compute both the rate variance and efficiency variance for direct labor costs incurred in manufacturing pillowcases in May. (Indicate the effect of each variance by selecting "F" for favourable, "U" for unfavourable, and "None" for no effect (i.e., zero variance). Round your answers to 2 decimal places. Negative amounts should be indicated by a minus sign. Omit the "$" sign in your response.) Labor rate variance $ (Click to select)UFNone Labor efficiency variance $ (Click to select)UFNone