Just my 2c.
I'm fussy about sanitising, so I would do it again, unless you were sure they were kept in a clean, closed space.
Your B/V mix should be fine to reuse. I often keep some in a spray bottle, and use it again after a couple of weeks. I hope I'm not assuming wrong <!-- s:D --><img src="{SMILIES_PATH}/icon_biggrin.gif" alt="

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And for your cals, calculate for the volume you are bottling, so minus the trub you'll leave behind, otherwise, your calculating for more liquid than you actually have in your bottling bucket/bottles and might get a bit of over carbonation.
Hope this helps <!-- s:) --><img src="{SMILIES_PATH}/icon_smile.gif" alt="

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