Houpe Corporation produces and sells a single product. Data concerning that product appear below: Per Uait Percent of Sales Selling price Variable expenses Contribution margin s 140 42 $ 98 1008 70 Fixed expenses are $490,000 per month. The company is currently seling 6,000 units per month. The overall effect on the company's monthly net operating income of this change? increase of $700 increase of $14,700 O decrease of $14,000 decrease of $700