const leaseCalculator = new LeaseCalculator();
leaseCalculator.calculate({
  // Make of the vehicle, for calculating manufacturer-based fees
  make: "Toyota",
  // Required, MSRP of the vehicle
  msrp: 23000,
  // Required, negotiated price of the vehicle
  sellingPrice: 21000,
  // Required, Residual value of the vehicle
  rv: 13110,
  // Whether the RV is an absolute value or a percentage of MSRP. Default: true
  isRVPercent: false,
  // Required, The money factor of the lease
  mf: 0.00125,
  // The state's sales tax in percentage. Default: 0%.
  salesTax: 6.25,
  // Total fees of the lease. Default: 0.
  totalFees: 1200,
});

// Get the lease monthly payment
const monthlyPayment = leaseCalculator.getMonthlyPayment();

calculate({
  // Make of the vehicle, for calculating manufacturer-based fees. Default: "".
  // See constants.js for valid values.
  make: "Toyota",
  // Required, MSRP of the vehicle
  msrp: 23000,
  // Required, negotiated price of the vehicle
  sellingPrice: 21000,
  // Required, Residual value of the vehicle.
  // If isRVPercent is true, value must be a percentage. I.e, if RV is 65%, rv should be 65.
  rv: 13110,
  // Whether the RV is an absolute value or a percentage of MSRP. Default: true
  isRVPercent: false,
  // Required, The money factor of the lease
  mf: 0.00125,
  // The length of the lease in months. Default: 36.
  leaseTerm: 36,
  // The state's sales tax in percentage. Default: 0%.
  salesTax: 6.25,
  // Total fees of the lease. Default: 0.
  totalFees: 1200,
  // Total discount from dealer and manufacturer. Default: 0.
  rebates: 500,
  // Total trade-in value. Default: 0.
  tradeIn: 0,
  // Down payment, if applicable. Default: 0.
  downPayment: 0,
  // Method of taxation to apply, based on state. Default: TAX_ON_MONTHLY_PAYMENT
  // See constants.js for valid values.
  taxMethod: 1,
});