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	$	25,400
Variable expenses		13,800
Contribution margin		11,600
Fixed expenses		7,772
Net operating income	$	3,828

If sales increase to 1,001 units, what would be the increase in net operating income ?