You need to add up the cost of supplies and add a bit for "labour"
eg. my HP laser 3 cartridges do 2000 copies = £120
2000 sheets of paper (4 reams) =£20
So the real question is ... how much can you get for your time ?
OnePlus 5T review: Hands-on
Illustrator Andrés Lozano on his improv line work, brazen use of colours & hand sketching
iPhone X review
Comment envoyer gratuitement des gros fichiers ?