I didn't know people used these as price tags. Looks like the same as Maco MR-1212 series labels,
http://macolabels.com/buymaco.php?partnum=MR-1212 but it looks like the maco's have more labels on a sheet. I thought the equivalent was for the Avery 5408. As far as your Word problem, I don't have a solution yet, let me know if you find a solution.