Parker Plastic, Incorporated, manufactures plastic mats to use with rolling office chairs. Its standard cost information for last year follows:

Standard Quantity Standard Price $($Rate$)$ Standard Unit Cost

Direct materials $($plastic$)8$ square foot $ $1\mathrm{.}20$ per square foot $ $9\mathrm{.}60$

Direct labor $0\mathrm{.}3$ hour $ $13\mathrm{.}30$ per hour $3\mathrm{.}99$

Variable manufacturing overhead $($based on direct labor hours$)0\mathrm{.}3$ hour $ $2\mathrm{.}40$ per hour $0\mathrm{.}72$

Fixed manufacturing overhead $($$$599,040-$: $936,000$ units$)0\mathrm{.}64$

Parker Plastic had the following actual results for the past year:

Number of units produced and sold $1,300,000$

Number of square feet of plastic used $12,700,000$

Cost of plastic purchased and used $ $13,970,000$

Number of labor hours worked $334,000$

Direct labor cost $ $4,141,600$

Variable overhead cost $ $1,620,000$

Fixed overhead cost $ $391,000$

Required:

Calculate Parker Plastic$$s variable overhead rate and efficiency variances and its over$-$ or underapplied variable overhead.

Note: Do not round intermediate calculations. Indicate the effect of each variance by selecting $"$F$"$ for favorable, $"$U$"$ for unfavorable, and "None" for no effect $($i$.$e$.,$ zero variance$).$