Last month when Holiday Creations, Incorporated, sold $38,000$ units, total sales were $$152,000,$ total variable expenses

and fixed expenses were $$38,900.$

points

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 $500$ units and total sales by

$$2,000?($Do not round intermediate calculations.$)$