PDF From Template with Multiple Item Grid

I have create a pdf template that I will be filling with information to generate a PDF document.  Part of the process will have an editable grid that can contain 1 or more items.  The PDF template has a table with 4 columns and 1 or more rows.  I have defined a single field for each column.  My question is has anyone done something similar and if so how did you handle the grid items to PDF.  I tried to insert an image but could not get it to work.

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