www.cutepdf.com is where I downloaded the free software. I get no commission from CutePDF.
After downloading and installing the software, when you print the document, you select the CutePDF printer. Instead of your physical printer starting, a window will open up for you to name the file. Save your order summary in to a specific folder (perhaps one named: Order Summaries) and name it so that you can find it easily (I suggest the Hostess Name followed by the Month and Year).
You can now attach that pdf document to any email.