explanation as well please

Highland Company produces a lightweight backpack that is popular with college students. Standard variable costs relating to a single backpack are given below: Overhead is applied to production on the basis of direct labor-hours. During March, 600 backpacks were manufactured and sold. Selected information relating to the month's production is given below: For the month's production. The following additional information is available for March's production: Required: Hint: it may be helpful to complete a general model diagram for direct materials, direct labor, and variable monufacturing overhead before attempting to answer any of the requirements. 1. What is the standard cost of a single backpack? 2. What was the actual cost per backpack produced during March? 3. How many yards of material are required at standard per backpack? 4. What was the materials price variance for March if there were no beginning or ending inventories of materials? 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 backpeck