function calculate_interest_button_Callback(hObject, eventdata, handles)
handles.loanAmtValue = loanAmtValue;
handles.yearlyInterestRateValue = yearlyInterestRateValue;
handles.mthlyPaymentValue = mthlyPaymentValue;
guidata(hObject,handles);

function loan_amount_edittext_Callback(hObject, eventdata, handles)
% Hints: get(hObject,'String') returns contents of loan_amount_edittext as text
%        str2double(get(hObject,'String')) returns contents of loan_amount_edittext as a double
loanAmt = get(hObject,'string');
loanAmtValue = str2double(loanAmt);
handles.loanAmtValue = loanAmtValue;
guidata(hObject,handles);

function y_interest_rate_edittext_Callback(hObject, eventdata, handles)
% Hints: get(hObject,'String') returns contents of y_interest_rate_edittext as text
%        str2double(get(hObject,'String')) returns contents of y_interest_rate_edittext as a double
yearlyInterestRate = get(hObject,'string');
yearlyInterestRateValue = str2double(yearlyInterestRate);
handles.yearlyInterestRateValue = yearlyInterestRateValue;
guidata(hObject,handles);

function monthly_payment_edittext_Callback(hObject, eventdata, handles)
% Hints: get(hObject,'String') returns contents of monthly_payment_edittext as text
%        str2double(get(hObject,'String')) returns contents of monthly_payment_edittext as a double
mthlyPayment = get(hObject,'string');
mthlyPaymentValue = str2double(mthlyPayment);
handles.mthlyPaymentValue = mthlyPaymentValue;
guidata(hObject,handles);