Delmar Inc. uses a standard cost system. Labor standards are 2.1 hours per widget at $9.20 per hour. During August, Delmar Inc. paid its workers $153,820 for 16,500 hours. Delmar Inc. produced 8,500 widgets during August. a. 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 (i.e., zero variance).) b. Calculate the direct labor efficiency variance. (Indicate the effect of variance by selecting "Favorable", "Unfavorable", or "None" for no effect (i.e., zero variance).)