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

follows:

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

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$).$