Difference 0.15 in maxMonthlyMortgagePayment of arm calculator

[sanket-3101]

i am getting 0.15 difference in max monthly income of arm calculator for following input value loan_amount: "100,000", rate_of_interest: "4", term: "30", month_before_first_adjustment: "12", month_between_adjustment: "12", expected_adjustment_rate: "0.25", initial_rate_interest: "3.25", max_interest_rate: "12",

expected output maximum_monthly_payment: $686.50 getting output maximum_monthly_payment: $686.35