Kropf Incorporated has provided the following data concerning one of the products in its standard cost system. Variable manufacturingoverhead is applied to products on the basis of direct labor$-$hoursInputsDirect materialsDirect laborVariable manufacturing overheadStandard Quantity orHours per Unit of Output$9\mathrm{.}40$ liters$0\mathrm{.}60$ hours$0\mathrm{.}60$ hoursStandard Price or Rate$ $9\mathrm{.}00$ per liter$ $24\mathrm{.}70$ per hour$ $7\mathrm{.}90$ per hourThe company has reported the following actual results for the product for September:Actual outputRaw materials purchasedActual cost of raw materials purchasedRaw materials used in productionActual direct labor$-$hoursActual direct labor costActual variable overhead cost$11\mathrm{.}600$units$110,000$ liters$ $1,010,500109,070$ liters$6\mathrm{.}380$ hours$ $160,302$$ $45414$Required:a$.$ Compute the materials price variance for September.b$.$ Compute the materials quantity variance for September.c$.$ Compute the labor rate variance for September.d$.$ Compute the labor efficiency variance for September.e$.$ Compute the variable overhead rate variance for September.f$.$ Compute the variable overhead efficiency variance for September.