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	$	20,600
Variable expenses		12,200
Contribution margin		8,400
Fixed expenses		6,468
Net operating income	$	1,932

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

if sales decline to 900 units, what would be the net operating income?

If the selling price increases by $2.20 per unit and the sales volume decreases by 100 units, what would be the net operating income

If the variable cost per unit increases by $1.20, spending on advertising increases by $1,700, and unit sales increase by 250 units, what would be the net operating income?