This is a letter merge document. Simply copy the parts above the line that you need duplicated, to the area below the line and run the merge.
If the items in the table are from separate consecutive records i.e. a many to one merge then use
http://www.gmayor.com/ManyToOne.htm and do the same as above. You will get a warning about the duplicated tables when you run the process, but you can ignore that.