Fortes Incorporated has 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 Standard Quantity or Hours per Unit of Output Standard Price or Rate

Direct materials $8\mathrm{.}1$ ounces $ $6\mathrm{.}20$ per ounce

Direct labor $0\mathrm{.}6$ hours $ $20\mathrm{.}80$ per hour

Variable manufacturing overhead $0\mathrm{.}6$ hours $ $4\mathrm{.}50$ per hour

The company has reported the following actual results for the product for April:

Actual output $5,700$ units

Raw materials purchased $48,300$ ounces

Actual cost of raw materials purchased $ $280,560$

Raw materials used in production $46,200$ ounces

Actual direct labor$-$hours $3,160$ hours

Actual direct labor cost $ $68,850$

Actual variable overhead cost $ $13,405$

Required:

a$.$ Compute the materials price variance for April.

b$.$ Compute the materials quantity variance for April.

c$.$ Compute the labor rate variance for April.

d$.$ Compute the labor efficiency variance for April.

e$.$ Compute the variable overhead rate variance for April.

f$.$ Compute the variable overhead efficiency variance for April.

$($Indicate the effect of each variance by selecting $"$F$"$ for favorable, $"$U$"$ for unfavorable, and "None" for no effect $($i$.$e$.,$ zero variance$).$ Input all amounts as positive values.$)$