10. 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 Variable expenses $23,000 13,000 Contribution margin Fixed expenses 10,000 8,500 Net operating income $ 1,500 Required How many units must be sold to achieve a target profit of $5,750? (Do not round intermediate calculations.) umber of units