Similar to the one color prints, when printing over the seams you can increase the perceived value to your customer. Over the seams and zipper fees are $0.50, so for $1.70 per print you can be offering options like the image on the right. This is a one color imprint (has halftone background) with a print over the sleeve seam.
Pricing for 100 shirts is $1.70 each! You can offer the shirts to your customers for $7 each (a very reasonable price for a unique decoration like this) and have a 100% markup, double what most people make in our industry!