Which job should I take?

first of all. sorry for posting twice but I accidently put it in the wrong category! ok ..

I have a dilemma!! im at college 5 days a week and I want a saturday job. today I had a day off college for personal reasons and I decided to go to town and apply for a job in 1 of the health shops! and it looked quite promising and it would pay about £5 an hour and id only be working 4 hours (this is great for me because then I can have spare time for my college work.. and thats why I applied for the job)

I recently did work experience at a pet shop. and the manager rang me a minute ago and offered me a sat job! but the pay isnt good at all and id be working from 9-6

I need 2 phone the manager and tell her what my decision is pretty soon.. but I dont know what 2 do.. because I might get the job at the health store but I might not…

what would you guys do if you were me?