Acme produces and sells two products: a large hat and a small hat. For every large hat they sell, they sell 2 small hats. Fixed costs for Acme are $9,840. A large hat sells for $50 and a small hat sells for $20. Variable costs for the large hat are $30 per hat and $10 for the small hat. What is the number of small hats that ACME sells at breakeven point?