Refer to the attachment

Required information [The following information applies to the questions displayed below.] 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 $ 80 , 000 Variable expenses 52 , 000 Contribution margin 28,000 Fixed expenses 21, 840 Net operating income $ 6, 160