P11-51A Work backward through labor variances ilearning Objective ) Petra's Music manufacture5 harmonicas Petra uses standard costs to judge ?erformance Recently, a clerk mistakenly threw away some of the records, and only partial data fer February exist. Petra knows that the total direct abar variance for the mont was $330 F and that the standard labor rate was $10 per hour. A recent pay cut caused a favorable labor price variance of $0.50 per hour. The standard direct labor hours for actua February outputs were 5,600 Requirements 1. Find the actual number of direct labor hours worked curing February. Fist, find the actual direct labor rate her hour. Then, determine the actual number of direct labor hours worked by sotting up the computation of the total direct labor variance as given Compute the direct labor rate and efficiency variances. Do these variances suggest that the manager may have made trade-offs? Explain 2