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When Isaiah Company has fixed costs of $103,530 and the contribution margin is $21, the break-even point is Oa. 5,700 units Ob. 12,420 units Oc.9,860 units Od. 4,930 units Variable costs as a percentage of sales for Lemon Inc. are 80%, current sales are $600,000, and fixed costs are $130,000. How much will operating income change if sales increase by $40,000? Oa. $8,000 decrease Ob. $30,000 decrease Oc. $30,000 increase Od. $8,000 increase Zipee Inc. 's unit selling price is $90, the unit variable costs are $40.50, fixed costs are $170,000, and current sales are 12,000 units. How much will operating income change if sales increase by 5,000 units? Oa. $125,000 decrease Ob. $247,500 increase Oc.$75,000 increase Od. $175,000 increase If fixed costs are $450,000, the unit selling price is $75, and the unit variable costs are $50, what are the old and new break-even sales (units) if the unit selling price increases by $10? Oa. 18,000 units and 12,857 units Ob. 6,000 units and 5,294 units c.9,000 units and 15,000 units Od. 18,000 units and 6,000 units Forde Co. has an operating leverage of 4. Sales are expected to increase by 12% next year. Operating income is Oa. unaffected On expected to increase by 4 % c, expected to increase by 396 od, expected to increase by 48%