Hollowell Audio, Inc., manufactures military-specification compact discs. The company uses standards to control its costs. The Labor standards that have been set for one disc are as follows: During July, 10,270 hours of direct labor time were required to make 19,500 discs. The direct labor cost totaled 561 .820 for the month. Required: 1a. According to the standards, what direct labor cost should have been incurred to make the 19,500 discs? 1b. By how much does this differ from the cost that was incurred? 2. Break down the difference in cost from (1) above into a labor rate variance and a labor efficiency variance. 3. The budgeted variable manufacturing overhead rate is $4.5 per direct labor-hour. During July. the company incurred $51,350 in variable manufacturing overhead cost. Compute the variable overhead rate and efficiency variances for the month