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Last month when Holiday Creations, Incorporated, sold $37,000$ units, total sales were $$148,000,$ total variable expenses were $$124,320,$ and fixed expenses were $$40,000.$

Required:

What is the company's contribution margin $($CM$)$ ratio?

What is the estimated change in the company's net operating income if it can increase sales volume by $600$ units and total sales by $$2,400?($Do not round intermediate calculations.$)$

$\backslash$table$[[1.$ Contribution margin ratio,$\%$