If I work 5 hours a day for 5 days for $15 an hour. I don't get paid for my lunch break which is 30 min every day. How much would do make?

I'm assuming that your lunch break comes during the work hours

So....you really are paid for 4.5 hrs per day

So....the weekly amount is

4.5  *  5 *  15     =   $337.50