A project has an initial investment of $650,000 and annual maintenance costs of $48,000. Annual operating cost will be directly in proportion to the level of production at $8.50 per unit, and each unit of product can be sold for $50.00. If the project has a life of five years, what is the minimum annual production level for which this project is economically viable? Work this problem on an after tax basis and assume five-year SL depreciation (SV5 = 0), effective income tax rate of 40% and after-tax MARR of 10% per year