Capital One produces a single product, which it sells for $8.00 per unit. Variable costs per unit equal $3.20. The company expects short-term fixed costs to be $5,760 for the coming month, at the projected sales level of 23,000 units. Management is considering several alternative actions designed to improve operating results. In conjunction with this, they have created a profit-planning (that is, a CVP) model, which can be used to evaluate different scenarios. Suppose that Capital One's management believes that a $2,400 increase in the monthly promotion costs will provide a boost to sales. By how many units must sales increase during the month to justify the contemplated expenditure? (Round answer up to the nearest whole number.) Multiple Choice None of these answer choices are correct. 600 units 1,000 units None of these answer choices are correct. 600 units 1,000 units 500 units. 300 units