the following actual and standard cost data for direct materials and direct labor related to the production of 100 units of production. direct material actual costs is 1500 lbs at $2 and standard cost is 2000 lbs at $3. direct labor actual cost is 1000 hours at $15 and standard costs is 1400 hours at $20. calculate the materials price variance and materials efficiency variance and labor rate variance and labor efficiency variance and state whether all are favorable or unfavorable