Please solve both the parts

Oslo Company prepared the following contribution format income statement based on a sales volume of 1000 units (the relevant range of production is 500 units to 1,500 units): $ Sales Variable expenses Contribution margin Fixed expenses Net operating income 21,500 12,500 9,000 7,200 1,800 $ Required: How many units must be sold to achieve a target profit of $5,400? (Do not round intermediate calculations.) Number of units 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 Contribution margin Fixed expenses Net operating income 24,800 13,600 11,200 7,728 3,472 $ Required: What is the break-even point in sales dollars? (Do not round intermediate calculations. Round your answer to the nearest dolla amount.) Break-even point