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Is there a difference between these ones? Which one is better?

1. Logically, thinking you would not shorten the hours or shut the store down because you need the sales. (Is it supposed to be 'need' or 'needed' Or it doesn't really matter?)

2. Logically, thinking you would not shorten the hours or shut the store down because you needed the sales.

3. Logically, thinking you would not shorten the hours or shut the store down because you (would) need the sales. ((Is 'would' omitted here? Is this the same as #1?)

Thanks.
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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.
You would not shorten the hours or shut the store down because you needed the sales.
You would not shorten the hours or shut the store down because you would need the sales.

These all make sense but, out of context, it's impossible for me to say which is correct.
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The comma is misplaced in the original, Jack, and there are a couple of other anomalies-- perhaps poorly edited or written by a non-native speaker? It should read:

Logically thinking, you would not shorten the hours or shut the store down, because you need the sales.

The first two sentences of the passage are conditionals, but then the text turns to present indicative (Payroll is controllable / sales is not / you need the sales / it means cutting back), stating facts. If anything is wrong with the sentence under discussion, it is the would: to avoid the mixed conditional (good lord!-- are we back to mixed conditionals again?!), I would change would to do.

Logically thinking, you do not shorten the hours or shut the store down, because you need the sales.
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Sorry about that.

Here I have found the rest of the context:
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; sales is not. Logically, thinking you would not shorten the hours or shut the store down because you need the sales Thus, it means cutting back on hours on your help.
Could you explain my first post now? Thanks.
 Mister Micawber's reply was promoted to an answer.
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