None of the sentences make sense. They might make sense if the comma was after "thinking" but I'm not convinced that the sentence structure would be acceptable. If you omit the first two words, it's possible to make meaningful sentences: You would not shorten the hours or shut the store down because you need the sales.
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If you owned your own business or managed your own store, and the sales were terrible/not very good, what would you do to meet overhead? Cut hours of your employees, shut the store down completely, or shorten the hours of the store that day, week, or month? Payroll is the most flexible thing that is controllable; sal