There are many different types of idiopathic headache with the pain in the back of the head, including epicrania fugax, nummular headache, cluster headache, and hemicrania continua. There is also a condition termed new daily persistent headache, which also belongs to this type and can cause a headache for several months.
Calculate Use: Multiply the number of pages per week (the average in a production environment is 100) by the number of weeks in a six-month period (26). A good estimate is that you will print 2,600 pages each six months. Now, take 2,600 and divide it by the number of pages the ink cartridge will print (225).
Before buying a printer, find out how many ink cartridges it will need, and how much they will cost. If you're buying a printer with individual ink tanks for each colour, then expect to pay around $20 for each cartridge. Cartridges for photo printers, which use high quality pigment inks, can cost $30 or more each.