How to add values in STL:: List container?

Im writing a program to add values of money within a stl::list container. How could I parse through and add the values together? Thanks. Code i want to use this in is below... I added the accumulate at the bottom.

    void readFile()
{
    string line, nuMoney, munney, cents;
    unsigned long dollarSign, period;


    ifstream myfile("MONEY.txt");

    int numLines = countLines("MONEY.txt");
    //cout << "NUMLINES: " << numLines << endl;

    if (!myfile.is_open())
    {
        cout << "ERROR: File could not be opened." << endl;
    }

    for (int i=0; i < numLines-1; i++)
    {
        getline(myfile, line, '\n');
        dollarSign = line.find('$');
        period = line.find('.');

        line.erase (remove(line.begin(), line.end(), ','), line.end()); //remove commas

        munney = line.substr(dollarSign+1);
        //cout << munney << endl;

        double MONEYS = atof(munney.c_str());
        //cout << fixed << setprecision(2) << MONEYS << '\n';

        list<double> acct;
        acct.push_back(MONEYS);

        }

        int sum = accumulate(acct.begin(), acct.end(), 0);
        cout << "SUM: " << sum << endl;

    }

}