Acme Inc. has the following information available: Actual price paid for material Standard price for material Actual quantity purchased and used in production Standard quantity for units produced Actual labor rate per hour Standard labor rate per hour Actual hours Standard hours for units produced A. Compute the material price and quantity, and the labor rate and efficiency variances. Enter all amounts as positive numbers. Material price variance Material quantity variance Favorable Labor rate variance Unfavorable Labor efficiency variance B. What are some possible causes for this combination of favorable and unfavorable variances