Parker Plastic, Inc., manufactures plastic mats to use with roling office chairs. Its standard cost information for last year follows: Parker Plastic had the following actual results for the past year: Required: Required: Caiculate Parker Plastic's direct fabor rate and efficiency variances. (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).)