Never bothered to work it out ~ 'cos I use laser printers mostly thus don't get through much ink ~ toner goes much further and gives a crisper image.
![whistle:](https://www.virtual-pub.com/SMF/Smileys/default/whistling.gif)
Do have one Inkjet in the house ~ bought 3 packs of ink for £17.95 and got the printer free...... as referred to earlier.