How much will it cost me to live?

Hi! Recently I have made the decision that after I graduate high school I will move in with my dad. Knowing my mom (who supports me 99% financially) will more than likely cut me off. She pays for my car insurance, phone, groceries, etc.

I'm curious as to how much I need to make each month to pay for myself.
phone: preferably an iphone on with att or verizon
Car: I'm 17, I turn 18 in August, I have a 2012 nissan versa, I have never wrecked or gotten a speeding ticket
groceries: I will morebghan likely have to buy these myself Bc me and my dad have totally differnet eating habits. I like fruits and vegetables etc
College: I have my tuition laid for but I still have to pay for books, parking, and I'm living at home

I probably won't move until mid-summee until I have saved up enough money from my 3 jobs

First prepare a small budget for every month. List out what things buying for this month and calculate one day total expense. To reduce the expense for buying unwanted things.