I got this far and need some help with the bottom answers

COSTELLO INDUSTRIES INC.
Contribution Margin Analysis
For the Year Ended December 31, 2012
	Planned contribution margin									$ 888,800
	Effect of change in sales:
		Sales quantity factor1
		Unit price factor2						231,000
		Total effect of change in sales								$ 11,000
	Effect of changes in variable cost of goods sold:
		Variable cost quantity factor3						$ 89,100
		Unit cost factor4						(53,900)
		Total effect of changes in variable cost of goods sold								$ 35,200
	Effect of changes in variable selling and administrative expenses:
		Variable cost quantity factor5						$ 19,800
		Unit cost factor6						(46,200)
		Total effect of changes in variable selling and admin. exp.								(26,400)
	Actual contribution margin									$ 908,600
1	Difference in units sold