Kropf Inc bas provided the following data concerning one of the products in its standard cost system Variable manufacturing overhead is applied to products on the basis of direct labor-hours Inputs Direct materials Direct labor Variable manufacturing overhead Standard Quantity or Hours per Unit of Output 9.40 liters 0.60 hours 0.60 hours Standard Price ar Rate $9.00 per liter $24.70 per hour 5.7.90 per hour The company has reported the following actual results for the product for September Actual output Raw materials purchased Actual cost of raw materials purchased materials used in production Actual direct labor-hours Actual direct labor cost Actual variable overhead cost 11,600 units 110,000 liters $1,010,500 109,070 liters 5,380 hours $160, 302 $ Required: a. Compute the materials price variance for September Compute the materials quantity variance for September c Compute the laborate variance for September d. Compute the labor efficiency variance for September Compute the variable overhead rate variance for September Compute the variable overhead officiency variance for September (indicate the effect of each variance by selecting "E" for favorable, "Ufor unfavorable, and "None for no effect (ie zero variance). Input all amounts as positive values.)