Accrue.js complete example with all options.

accrue.example.js

$( selector ).accrue({
  mode: "basic",
  operation: "keyup",
  default_values: {
    amount: "$7,500",
    rate: "7%",
    rate_compare: "1.49%",
    term: "36m",
  },
  field_titles: {
    amount: "Loan Amount",
    rate: "Rate (APR)",
    rate_compare: "Comparison Rate",
    term: "Term"
  },
  button_label: "Calculate",
  field_comments: {
    amount: "",
    rate: "",
    rate_compare: "",
    term: "Format: 12m, 36m, 3y, 7y"
  },
  response_output_div: ".results",
  response_basic: 
    '<p><strong>Monthly Payment:</strong><br>$%payment_amount%</p>'+
    '<p><strong>Number of Payments:</strong><br>%num_payments%</p>'+
    '<p><strong>Total Payments:</strong><br>$%total_payments%</p>'+
    '<p><strong>Total Interest:</strong><br>$%total_interest%</p>',
  response_compare: "Save $%savings% in interest!",
  error_text: "Please fill in all fields.",
  callback: function ( elem, data ){}
});