Contribution margin ratio

a$.$ Coastal Company budgets sales of $$1,270,000,$ fixed costs of $$74,300,$ and variable costs of $$330,200.$ What is the contribution margin ratio for Coastal Company?

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b$.$ If the contribution margin ratio for Bushner Company is $46\%,$ sales were $$652,000,$ and fixed costs were $$206,940,$ what was the operating income?