Farr Industries Inc. Contribution Margin Analysis For the Year Ended December 31 Planned contribution margin Effect of change in sales Sales quantity factor S 540,000#REF! S 310,500 103,500 Unit price factor Total effect of change in sales 5 207,0001#REF! Effect of changes in variable cost of goods sold: Variable cost quantity factor Unit cost factor S (148,500 103,500 Total effect of changes in variable cost of goods sold is (45,000)!#REF! Effect of changes in variable selling and administrative expenses Variable cost quantity factor Unit cost factor S (81,000) 07,000 Total effect of changes in variable selling and admin. exp 000) #REFI Actual contribution margin 414,000 I#REF! Difference in units sold Sales quantity factor Difference in sales price Unit price factor Difference in units sold Variable cost quantity factor Difference in unit variable cost of goods sold Unit cost factor Difference in units sold Variable cost quantity factor Difference in unit variable selling and admin. exp Variable cost quantity factor