What is a good salary?

Hi there, I'm 16 and I want to apply for a job (weekend job, 8 hours) but it's asking me what salary i would want. I don't know how much a good salary would be for a weekend job, and so I need help🙏🙏

Lemme just add as well that the pay is £11.20 an hour, but the question is still asking me for what salary i would want