RJM Enterprises is a manufacturer of consumer electronics products. The industry is very competitive, and RJM has seen its profits fal in recent years, including an operating loss of $16,328 last year. RJM was able to turn that around this year by aggressively cutting costs. The summarized financial results for RJM are shown below: Current Year Prior Year Gross sales: $935, 750 $1, 280, 971 Less variable costs Direct materials 517, 716 767, 760 Direct labor 330,960 493,539 Total contribution margin $ 87, 074 $ 19, 672 Fixed cost 33, 509 36,000 Operating income $ 53,565 $ (16, 328) Jim Green, the management accountant at RJM, is analyzing the company's performance for this year in order to explain to management the specific aspects that drove the company to success. Some of the information Jim obtained follows: Current Year Prior Year Sales units 39 , 400 45, 700 Price $ 23.75 $ 28.03 Direct materials cost per unit of material S 7.30 S 8. 40 Direct materials required per unit 1. 80 2.00 Direct labor required per unit 0.60 0. 75 Wage rate ($/hour) $ 14.00 $ 14. 40 Assume that RJM, for efficiency and to reduce cost, maintains little or no direct materials or work-in-process inventory. Required: 1. Determine the selling price variance for the current year based on sales dollars. Determine the sales volume variance based on contribution margin. 2. Determine the following variable cost variances: a. The usage and price variances for direct materials. b. The efficiency and rate variances for direct labor