Invoice Mail Merge: Multiple Records per Invoice

I need a mail merge to generate invoices from a spreadsheet. There can be multiple records for each date, and I want all those records printed on a single invoice.

spreadsheet and word mail merge template attached.

There might be a possibilty in the near future to do a mailmerge in word with multiple worksheets and records. check in www.x-merge.com, I think that's what you are looking for.