Kropi Incorporated has provided the following data concerning one of the products in its standard cost system. Varlable manufacturing overhead is applied to products on the basis of direct labor:hours. The company has reported the following actual results for the product for September: Required: a. Compute the materials price variance for September. b. Compute the materials quantity varlance for Septembet c. Compute the labor rate vartance for September d. Compute the labor efficiency variance for September e. Compute the variable oveithead rate vartance for September. f. Compate the varlable overhead eticiency variance for September (indicote the effect of each varionce by selecting "F" for fovorable, "U" for unfavorable, and "None" for no effect (i.e., zero variance). Input oll amounts os positive values.)