Parker Plastic, Inc., manufactures plastic mats to use with rolling office chairs. Its standard cost information for last year follows: Standard Standard Price Quantity (Rate) 10 sq ft. $ 1.13 per sq. ft. 0.3 hr. $11.20 per hr. 0.3 hr. $ 3.00 per hr. Standard Unit Cost $11.30 3.36 Direct materials (plastic) Direct labor Variable manufacturing overhead (based on direct labor hours) Fixed manufacturing overhead $422,280 + 918,000 units) 0.90 0.46 Parker Plastic had the following actual results for the past year: Number of units produced and sold Number of square feet of plastic used Cost of plastic purchased and used Number of labor hours worked Direct labor cost Variable overhead cost Fixed overhead cost 1,120,000 11,800,000 $ 14,160,000 316,000 $ 3,634,000 $ 960,000 $ 373,000 Variable Overhead Rate Variance Variable Overhead Efficiency Variance Variable Overhead Spending Variance