Corporation produces and seils a single product. Data concerning that product appear below Being price Variable expenses Contribution margin Per Unit $100 04 Percent of Sales 100% 60% 40% The company is currently selling 5900 units per month, fixed expenses are $198,000 per month. The marketing manager believes that a $5600 increase in the monthly advertising budget would result in 130 unit increase in morithly sales. What should be the overall effect on the company's monthly net operating income of this change? O decrease of $5600 Oincrease of $8320 O decrease of $2720 O increase of $2720