Mail Merge with no blank lines for missing data

I am attempting to set up a Mail Merge using Excel and Word 2007 on Win XP.
The XL data file looks something like:

Name      Jan 1          Jan 15          Feb 5...
Frank     $100.00                              $5.70
Ethyl                            $10.25         $15.35
Tony       $23.00        $12.75          $50.35

The Word document is to include the dates and amount but only if the amounts are non zero.

For Frank the letter would include:
Jan 1         $100.00
Feb 5             $5.75
and Jan 15 would not be shown.

For Ethyl:
Jan 15         $10.25
Feb 5           $15.75
and Jan 1 would not be shown.

For Tony there would be all 3 items.  The table actually contains many more rows and columns but the types of data are the same as shown above.

How do I set up the merge to show the dates and amounts for any entries where the amount is non-zero and not show a date with no amount where the amount is zero?  I don't care whether it is a table or simply a list of dates and amounts.