Babysitting??

Okay so I really need help my cousin wants me to take care of her baby from monday thru Friday 10a-6pm how much should I charge?? she said this girl was taking care of her baby & she was paying her $20 a day which is $100 a week. what do y'all think? TIA

UPDATE: so Im only charging $20 since she is my cousin & she going through some hard time THANK YOU ALL. I posted anonymously cause Sometimes theres some raw coments & rude ppl but y'all who commented had helped me a lot! HAVE A NICE THANKSGIVING ♡♡