I am a freelance copy editor/proofreader (native English speaker) and have copy-edited your text as follows:
MFPs differ from other models in both functionality and in unit running cost. High usage of these printers increases not only the running cost, but also incurs expensive equipment maintenance and repair. Consideration should also be given to unnecessary personal use as this only increases cost wastage.
Note that this text required heavy copy-editing, not simply proofreading as it needed to be re-written substantially to sound 'English'. Also the last sentence would have to be clarified with the translator as it did not make much sense.
I would be interested in talking to you further to offer my copy-editing services.
My rate is USD$20 per 1000 words for copy-editing.
My turn-around on 1000 words is 1 day (to take account of the time difference as I live in New Zealand).
Please reply if you wish to discuss this further. You can send a private message or email at lizjohns1(at)gmail(dot)com.
Thank you for your time in reading this,
- For Teachers