Last month when Holiday Creations, Inc. sold 37,000 units, total sales were $305,000, total variable expenses were $259,250, and fixed expenses were $36,100.

Required:

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

2. What is the estimated change in the company's net operating income if it can increase total sales by $1,200.

I got the answer for 1 having trouble with 2.