O'Neill, Inc's income statement for the most recent month is given below: Total Sales Contribution Margin Segment Margin $4,000,000 $1,650,000 $850,000 Southern $2,500,000 $1,050,000 $700,000 Northern $1,500,000 $600,000 $150,000 If the Northern Division's sales increase by $300,000, how would this affect the company's net operating income? $30,000 increase O $120,000 increase $150,000 increase $123.750 increase