Assume the following information from the previous month: Amount Selling price $ 32 Variable expense ratio 50% Fixed expenses $ 20,000 per month Unit sales 2,500 per month Next month the company is considering a proposal that would increase fixed expenses by 75% and decrease the variable expense per unit by $4.00. If this proposal is implemented, how many units will have to be sold next month to earn the same net operating income as the previous month?