Most sizes cost $9.73 to print and $4.75 to ship, so my margin is $13.52 (lol). $5 of that goes to my mortgage principal (not usury or taxes) and the rest pays for store expenses, designs, income taxes, etc. Of course, if you buy more than one shirt, I'll save on shipping and have that much more net revenue.
If you're poor or would rather not support me, I want to make it easy for you to recreate this yourself. Go to printify.com and find the Gildan 2400 Unisex Ultra Cotton Long Sleeve Tee (fulfilled by SwiftPOD) and use this image:
