Highland Company produces a lightweight backpack that is popular with college students. Standard variable costs relating to a single backpack are given below: Standard Quantity or Hours Standard Price or Rate $3.00 per yard Standard Cost $ ? Direct materials Direct labor $ per direct 2 labor-hour Variable manufacturing overhead Total standard cost per unit Overhead is applied to production on the basis of direct labor-hours. During March, 570 backpacks were manufactured and sold. Selected information relating to the month's production is given below: Direct Labor $6,384 Materials Used $ 8,550 $ 6,080 ? $ 570 U Variable Manufacturing Overhead $1,596 $ 2,812 Total standard cost allowed Actual costs incurred Materials price variance Materials quantity variance Labor rate variance Labor efficiency variance Variable overhead rate variance Variable overhead efficiency variance *For the month's production. The following additional information is available for March's production: 855 Actual direct labor-hours Difference between standard and actual cost per andard and actual cost per backpack produced during March $ 0.20 F 5. What is the standard direct labor rate per hour? 6. What was the labor rate variance for March? The labor efficiency variance? 7. What was the variable overhead rate variance for March? The variable overhead efficiency variance? 8. Prepare a standard cost card for one backpack