Oslo Company prepared the following contribution format income statement based on a sales volume of 1,000 units (the relevant range of production is 500 units to 1,500 units): Sales $ 21,800 Variable expenses 12,600 Contribution margin 9,200 Fixed expenses 7,452 Net operating income $ 1,748 Required: If sales increased to 1,001 units, what would be the increase in net operating income?