It means that even if it's the right colour (which it is) and even if it's the right size (which it may be since the salesman suggests it is), the customer has no plans to buy it , and so to try it on for size would be pointless, since it's not going to get bought under any circumstances (because the customer dislikes the style - as the salesman himself said ("I know this jacket is not the style you want") d
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