Here's what the table/text file/spreadsheet look like for a different product:

Pricing table from website:


Text file that I took into Excel; this time I used the '^' as a delimiter so the prices would be at end of each cell (rather than one long string all in one cell); I don't know if that helps or not:


(And you mentioned RTF; the import/export file is actually a .txt file if that matters.)

Spreadsheet of values to merge into the text file: