Mark got a 5% raise at his job.  Before the raise, he earned 40 dollars per hour.  He works 8 hours per day for 5 days per week.  His old bills used to be 600 dollars a week but he decided to add a hundred dollar a week personal trainer.  How much does he have leftover a week?
Please reason step by step, and put your final answer within \boxed{}.
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