Mosschops - what do you mean that you had £27 left for the month? If you have a DH then his money is your money IMO! TBH I cannot understand man and wife having separate finances.
That aside, the nozzle in the printer can be cleaned through process outlined in printer instructions. You will probably find that you can get cheaper alternatives for ink cartridges that are compatable for your computer. Yopu need to shop around.
Good luck with your assignment. If all else fails, copt it onto floppy disk and take it to uni for printing. It is also not the first time I have e-mailed an assignement to my tutor!!