It depends how many years you have been a scientist, and how experienced you are, and who you work for. I work in a university, so about £32,000 per year (£90 per day). When I was a PhD student I earned about £55 per day. With more experience it should go up a bit, and maybe if I worked for a company the pay would be higher. But it is more important to enjoy your work than to earn lots of money. In some countries scientists are paid more, and in others they are paid less.