In 2012, Raleigh sold 1,000 units at $500 each, and earned net income of $50,000. Variable expenses were $300 per unit, and fixed expenses were $150,000. The same selling price is expected for 2013. Raleigh's variable cost per unit will rise by 10% in 2013 due to increasing material costs, so they are tentatively planning to cut fixed costs by $15,000. How many units must Raleigh sell in 2013 to maintain the same income level as 2012?