I am trying to make a mail merge document that will list multiple items for
one company in the letter.  For example:

Company A        Product 1
Company A        Product 2
Company B        Product 3
Company B        Product 4
Company B        Product 5

So, I want to send company A one letter with products 1 & 2 listed and I
want to send Company B one letter with products 3, 4 & 5 listed.  

All I can figure out is how to repeat a set number of rows, which doesn't
work because the number of products varies for each company.  Or how to make
a separate letter for each product, which I don't want to do, because I don't
want to send multiple letters to one company.

If anyone can please tell me how to accomplish this, I would be very grateful.

Thank you!