Count the pieces per hour produced and calculate the difference between selling price and cost of the garment on every order. Pieces per hour times profit per piece is the measure. Don’t bother with the cost of ink and other supplies because they are, per item printed, minor.
With the information gathered, you will direct your business into the most profitable opportunities. You will find you make more money printing one color than when printing multiple colors, and more money printing wovens like piqué rather than ordinary T-shirts.
—R Jennings Mfg. Co. Inc.