calcFunction() {
    double __total = 0.0;
    double __loanAmount = _loanAmount;
    double __downPayment = _downPayment < _loanAmount &&
        _downPayment <= _maxPurchasePrice / 6 ? _downPayment : 0.0;
    double __bpmi = 0.0;
    String __bpmiTerm = _term > 20 ? 'more' : 'less';
    double __adjustedAmount = _refinance == true ? __loanAmount : __loanAmount -
        __downPayment;
    double __ltvActual = __adjustedAmount / __loanAmount;
    double __ltvCon = 0.97;
    double __ltvFha = 0.965;

    double __totalAmount = __adjustedAmount;
    double __apr = _interestRate / 1200;
    double __months = _term * 12;

    double __principleAndInterest = (__apr + (__apr / (pow((1 + __apr), __months) - 1))) *
        __totalAmount;
    double __tax = (_taxRate * _loanAmount / 12);
    double __insurance = (_propertyInsuranceRate * _loanAmount / 12);
    double __mmi = 0.0;

    String __ltvString;
    if (__ltvActual > 95.001 && __ltvActual <= 97) {
      __ltvString = '97';
    } else {
      if (__ltvActual > 90.001 && __ltvActual <= 95) {
        __ltvString = '95';
      } else {
        if (__ltvActual > 85.001 && __ltvActual <= 90) {
          __ltvString = '90';
        } else {
          if (__ltvActual < 85) {
            __ltvString = '85';
          } else {
            __ltvString = null;
          }
        }
      }
    }


    if(_program == 'va'){
      switch (_vaSubType) {
        case "first":
          {
            __adjustedAmount *= 1.0215;
          }
          break;
        case "disability":
          {
            __adjustedAmount = __adjustedAmount;
          }
          break;
        default:
          { //not first or disabled.
            __adjustedAmount *= 1.033;
          }
      }
    }
    else if (_program == 'fha') {
      __adjustedAmount *= 1.0175;

      if ((1 - __downPayment / __loanAmount) > __ltvFha && !_refinance) {
        __downPayment = (1 - __ltvFha) * __loanAmount;
      }

      __mmi = (__downPayment / __loanAmount) > .05
          ? (.008 * __adjustedAmount / 12)
          : (.0085 * __adjustedAmount / 12);
    }
    else if (_program == 'usda') {
      __adjustedAmount *= 1.005;
      __mmi = (.0035 * __adjustedAmount / 12);
    }
    else { // program == 'con'

      print('Enter the BPMI Dome');
      if ((1 - __downPayment / __loanAmount) > __ltvCon && !_refinance) {
        __downPayment = (1 - __ltvCon) * __loanAmount;
      }

      switch (_creditScore) {
        case '760':
          __bpmi = bpmiMap['760'][__ltvString][__bpmiTerm];
          __bpmi += !!_cashOut             ? bpmiMap['760']["cashOut"]        : __bpmi;
          __bpmi += !!_investmentProperty  ? bpmiMap['760']["investmentProp"] : __bpmi;
          __bpmi += !!_manufactured        ? bpmiMap['760']["manfactured"]    : __bpmi;
          __bpmi += !!_secondHome          ? bpmiMap['760']["secondHome"]     : __bpmi;
          __bpmi += !!_multiUnit           ? bpmiMap['760']["multiUnit"]      : __bpmi;

          __bpmi -= !!_multiBorrower       ? bpmiMap['760'][__ltvString]["multiBorrower"] : __bpmi;


          __bpmi = __bpmi * __loanAmount / 12;
          break;
        case '740':
          __bpmi = bpmiMap['760'][__ltvString][__bpmiTerm];
          __bpmi += !!_cashOut             ? bpmiMap['740']["cashOut"]        : __bpmi;
          __bpmi += !!_investmentProperty  ? bpmiMap['740']["investmentProp"] : __bpmi;
          __bpmi += !!_manufactured        ? bpmiMap['740']["manfactured"]    : __bpmi;
          __bpmi += !!_secondHome          ? bpmiMap['740']["secondHome"]     : __bpmi;
          __bpmi += !!_multiUnit           ? bpmiMap['740']["multiUnit"]      : __bpmi;

          __bpmi -= !!_multiBorrower       ? bpmiMap['740'][__ltvString]["multiBorrower"] : __bpmi;


          __bpmi = __bpmi * __loanAmount / 12;
          break;
        case '720':
          __bpmi = bpmiMap['760'][__ltvString][__bpmiTerm];
          __bpmi += !!_cashOut             ? bpmiMap['720']["cashOut"]        : __bpmi;
          __bpmi += !!_investmentProperty  ? bpmiMap['720']["investmentProp"] : __bpmi;
          __bpmi += !!_manufactured        ? bpmiMap['720']["manfactured"]    : __bpmi;
          __bpmi += !!_secondHome          ? bpmiMap['720']["secondHome"]     : __bpmi;
          __bpmi += !!_multiUnit           ? bpmiMap['720']["multiUnit"]      : __bpmi;

          __bpmi -= !!_multiBorrower       ? bpmiMap['720'][__ltvString]["multiBorrower"] : __bpmi;


          __bpmi = __bpmi * __loanAmount / 12;
          break;
        case '700':
          __bpmi = bpmiMap['760'][__ltvString][__bpmiTerm];
          __bpmi += !!_cashOut             ? bpmiMap['700']["cashOut"]        : __bpmi;
          __bpmi += !!_investmentProperty  ? bpmiMap['700']["investmentProp"] : __bpmi;
          __bpmi += !!_manufactured        ? bpmiMap['700']["manfactured"]    : __bpmi;
          __bpmi += !!_secondHome          ? bpmiMap['700']["secondHome"]     : __bpmi;
          __bpmi += !!_multiUnit           ? bpmiMap['700']["multiUnit"]      : __bpmi;

          __bpmi -= !!_multiBorrower       ? bpmiMap['700'][__ltvString]["multiBorrower"] : __bpmi;


          __bpmi = __bpmi * __loanAmount / 12;
          break;
        case '680':
          __bpmi = bpmiMap['760'][__ltvString][__bpmiTerm];
          __bpmi += !!_cashOut             ? bpmiMap['680']["cashOut"]        : __bpmi;
          __bpmi += !!_investmentProperty  ? bpmiMap['680']["investmentProp"] : __bpmi;
          __bpmi += !!_manufactured        ? bpmiMap['680']["manfactured"]    : __bpmi;
          __bpmi += !!_secondHome          ? bpmiMap['680']["secondHome"]     : __bpmi;
          __bpmi += !!_multiUnit           ? bpmiMap['680']["multiUnit"]      : __bpmi;

          __bpmi -= !!_multiBorrower       ? bpmiMap['680'][__ltvString]["multiBorrower"] : __bpmi;


          __bpmi = __bpmi * __loanAmount / 12;
          break;
        case '660':
          __bpmi = bpmiMap['760'][__ltvString][__bpmiTerm];
          __bpmi += !!_cashOut             ? bpmiMap['660']["cashOut"]        : __bpmi;
          __bpmi += !!_investmentProperty  ? bpmiMap['660']["investmentProp"] : __bpmi;
          __bpmi += !!_manufactured        ? bpmiMap['660']["manfactured"]    : __bpmi;
          __bpmi += !!_secondHome          ? bpmiMap['660']["secondHome"]     : __bpmi;
          __bpmi += !!_multiUnit           ? bpmiMap['660']["multiUnit"]      : __bpmi;

          __bpmi -= !!_multiBorrower       ? bpmiMap['660'][__ltvString]["multiBorrower"] : __bpmi;


          __bpmi = __bpmi * __loanAmount / 12;
          break;
        case '640':
          __bpmi = bpmiMap['760'][__ltvString][__bpmiTerm];
          __bpmi += !!_cashOut             ? bpmiMap['640']["cashOut"]        : __bpmi;
          __bpmi += !!_investmentProperty  ? bpmiMap['640']["investmentProp"] : __bpmi;
          __bpmi += !!_manufactured        ? bpmiMap['640']["manfactured"]    : __bpmi;
          __bpmi += !!_secondHome          ? bpmiMap['640']["secondHome"]     : __bpmi;
          __bpmi += !!_multiUnit           ? bpmiMap['640']["multiUnit"]      : __bpmi;

          __bpmi -= !!_multiBorrower       ? bpmiMap['640'][__ltvString]["multiBorrower"] : __bpmi;


          __bpmi = __bpmi * __loanAmount / 12;
          break;
        case '620':
          __bpmi = bpmiMap['760'][__ltvString][__bpmiTerm];
          __bpmi += !!_cashOut             ? bpmiMap['620']["cashOut"]        : __bpmi;
          __bpmi += !!_investmentProperty  ? bpmiMap['620']["investmentProp"] : __bpmi;
          __bpmi += !!_manufactured        ? bpmiMap['620']["manfactured"]    : __bpmi;
          __bpmi += !!_secondHome          ? bpmiMap['620']["secondHome"]     : __bpmi;
          __bpmi += !!_multiUnit           ? bpmiMap['620']["multiUnit"]      : __bpmi;

          __bpmi -= !!_multiBorrower       ? bpmiMap['620'][__ltvString]["multiBorrower"] : __bpmi;


          __bpmi = __bpmi * __loanAmount / 12;
          break;
        default:
          __bpmi = 0.0;
          break;
      }
    }

    __total = __principleAndInterest + __tax + __insurance + __mmi + _hoa + __bpmi;

    _principleInterest = __principleAndInterest;
    _tax = __tax;
    _propertyInsurance = __insurance;
    _downPayment = __downPayment;
    _mmi = __mmi;
    _bpmi = __bpmi;
    _monthlyTotal = __total;



  }