In 2016, Raleigh sold 1,000 units at $500 each, and earned net income of $40,000. Variable expenses were $300 per unit, and fixed expenses were $160,000. The same selling price is expected for 2017. Raleighs variable cost per unit will rise by 10% in 2017 due to increasing material costs, so they are tentatively planning to cut fixed costs by $10,000. How many units must Raleigh sell in 2017 to maintain the same income level as 2016?