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) 10 square foot $ 1.13 per square foot $ 11.30 Direct labor 0.3 hour $ 11.20 per hour 3.36 Variable manufacturing overhead (based on direct labor hours) 0.3 hour $ 3.00 per hour 0.90 Fixed manufacturing overhead ($422,280 918,000 units) 0.46 Parker Plastic had the following actual results for the past year: Number of units produced and sold 1,120,000 Number of square feet of plastic used 11,800,000 Cost of plastic purchased and used $ 14,160,000 Number of labor hours worked 316,000 Direct labor cost $ 3,634,000 Variable overhead cost $ 960,000 Fixed overhead cost $ 373,000 Required: Calculate Parker Plastics 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 (i.e., zero variance).