Parker Plastic. Incorporated, manufactures plastic mats to use with rolling office chairs. lis standard cost information for last year follows. Parker Plastic hod the following actual results for the past year: Required: Calculate Parker Plastic's direct labor rate and efficiency variances 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 (Le., zero variance)