Parker Plastic, Inc., manufactures plastic mats to use with rolling office chairs. Its standard cost information for last year follows: Standard Standard Price Standard Quantity (Rate) Unit CostDirect materials (plastic) 9 sq ft. $ 1.30 per sq. ft. $ 11.70 Direct labor 0.3 hr. $ 13.50 per hr. 4.05 Variable manufacturing overhead(based on direct labor hours) 0.3 hr. $ 1.30 per hr. 0.39 Fixed manufacturing overhead($619,080 ÷ 938,000 units) 0.66 Parker Plastic had the following actual results for the past year:Number of units produced and sold 1,000,000Number of square feet of plastic used 12,800,000Cost of plastic purchased and used $ 15,360,000Number of labor hours worked 336,000Direct labor cost $ 4,200,000Variable overhead cost $ 1,700,000Fixed overhead cost $ 393,000Required:Calculate Parker Plastic’s variable overhead rate and efficiency variances and its over- or underapplied variable overhead. (Do not round intermediate calculations. Indicate the effect of each variance by selecting "F" for favorable/Overapplied and "U" for unfavorable/underapplied.)Variable Overhead Rate Variance $Variable Overhead Efficiency Variance $Variable Overhead Spending Variance $