My program doesnt give me the output i expect it to give back. for the
total value of the coins it doesnt give me the total.
it just give a Zero as total value.
i would like you to help me solve it . Thanks in advance.

public class Coins {

    private static final int NICKEL = 5;
    private static final int DIME = 10;
    private static final int QUARTER = 25;
    private static final int  PENNY = 1;
    private int Quart;
    private int Nick;
    private int Dim;
    private int Pen;
    private int Total;
    private int NoP;
    private int NoN;
    private int NoD;
    private int NoQ;

    public Coins(int P, int N, int D, int Q)
    {
        NoP = P ;
        NoN = N ;
        NoD = D ;
        NoQ = Q ;
    }

    public void addCoins (String Co, int C)
    {if (Co.equalsIgnoreCase ("PENNIES"))
        {

        NoP = NoP + C;

        }
    else if (Co.equalsIgnoreCase ("QUARTERS"))
        {
        Co = "Quarter";

        NoQ = NoQ +C;

        }
    else if  (Co.equalsIgnoreCase ("NICKELS"))
        {
        Co = "Nickel";

        NoN =NoN +C;

        }
    else if (Co.equalsIgnoreCase ("DIMES"))
        {
        Co= "Dime";

        NoD = NoD  +C;

        }

    }

    public void getPennyValue()
    {
        Pen = (NoP*PENNY);

    }
    public void getNickelValue()
    {
        Nick= (NICKEL*NoN);

    }
    public void getQuarterValue()
    {
        Quart = (QUARTER *NoQ);

    }
    public void getDimeValue()
    {
        Dim =  (DIME*NoD);

    }
    public int getTotalValue()
    {
        Total = Dim + Nick + Pen + Quart;
        return Total ;
    }
    public String toString() {
        String str = "[";
        str = str + "Number of penny = " + NoP + ", Number of Nickel = " +
NoN + ", Number of Dime = " + NoD +", Number of Quarter = " + NoQ + ",
Total Value = " + Total +"]";
        return str;
    }
}