ARRAYS AGAIN????

I have tried to do this but I can not figure out how to get this. I
need to enter some values and put them in an array. and have those
values put in a range example is below, below that is my code I have
written so far. I can enter values but I can not figure out how to put
them in the correct cells in the array so that they add up to give me
the total in each price range. Confused yet? I am!
Arrays are driving me nuts! Please I just need some advice to get me
in the right direction. Thank you.

ranges HOW MANY SALEPEOPLE IN EACH RANGE

\$0-99 ---------------- 1
\$100-199 ---------------- 2
\$200-299 ---------------- 1
\$300-399 ---------------- 3
\$400-499 ---------------- 1
\$500-599 ---------------- 0
\$600-699 ---------------- 2
\$700-799 ---------------- 0
\$800-899 ---------------- 2
\$900-999 ---------------- 0
\$1000+ ---------------- 1

This program has got me all confused if there is anyone with
some suggestions please feel free.

---------------------------------------------------------------------------
import javax.swing.*;

public class range
{

public static void main( String[] args )
{

int gross = 0;

String output;

int[] total = new int[10];

while( gross != -1)
{

String input = JOptionPane.showInputDialog(null, " Enter
The Gross Sales Amount, -1 to quit" );

gross = Integer.parseInt( input );

if ( gross <= 299 )
total[0]+=total[0]++;

if ( gross <= 399 )
total[1]+=total[1]++;

}

output = "\$200-\$299 " + total[0] +
"\n\$300-\$399 " + total[1];

JOptionPane.showMessageDialog(null, output,"gross salaries ",

JOptionPane.INFORMATION_MESSAGE );

System.exit( 1 );
}

}