Ranbow Inc.is about to introduce a new LED clock and has determined that it will charge $35 per clock. The firm must decide whether or not to purchase a high-capacity clock-making machine. If the high-capacity machine is selected, then the fixed costs for the firm will be $4,000 per year, with variable costs of $6 per clock. Otherwise the fixed costs will be $800, with variable costs of $16 per clock. Above what level of expected sales should Ranbow Inc. choose the high fixed cost alternative to maximize pretax operating cash flow?