Finance Question, Please leave an explanation!!!

Julia brings home $1,700 per month after taxes. Her rent is $377 per month, her utilities are $92 per month, and her car payment is $268 per month Julia is currently paying $211 per month to her orthodontist for her braces. Julia's groceries cost $59 per week and she estimates her other expenses to be $154 per month. Assume there are four weeks in a month. Given Julia's expected expenses, how much will she have left each month to put toward savings to reach hor financial goals? (Round to the nearest dolar) Julia is considering trading in her car for a new one. Her new car payment will be $340 per month, and her insurance cost will increase by $6 per month Julia determines that her other car-related expenses (gas, oil) will stay about the same. What is the opportunity cost if Julia purchases the new car? $ (Round to the nearest dollar)