Klein Company distributes a high-quality bird feeder that sells for $20 per unit. Variable costs are $6 per unit, and fixed costs total $196,000 annually. Assume again that the company sold 23,000 units last year. The president feels that it would be unwise to change the selling price. Instead, he wants to increase the sales commission by $3 per unit. He thinks that this move, combined with some increase in advertising, would increase annual unit sales by 50%. By how much could advertising be increased with profits remaining unchanged? se the incremental analysis approach.