Apologies for the late quiz... been rather busy today. Here's another simple
one, but practical. I didn't get specific about input
formats/parameters/etc, I leave that to you this week.


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3.  Enjoy!

Suggestion:  A [QUIZ] in the subject of emails about the problem
helps everyone on Ruby Talk follow the discussion.  Please reply to
the original quiz message, if you can.
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## Price Ranges

_Quiz description by James Edward Gray II_

You have a list of price ranges from different vendors like:

    Company A:  $1,000 - $3,000
    Company B:  $6,000 - $10,000
    Company C:  $500 - $2,500

Given such a list and the desired price range a shopper wishes to pay,
return the companies the shopper should examine. For example, if the
shopper's price range was:

    Low:   $2,500
    High:  $5,000

the companies returned would be:

    Company A
    Company C

The shopper should also be allowed to provide just a low or just a high
value instead of both, should they prefer to do so.