Find minimum and maximum value for two dimensional array

Hi, I have been beating my head against the wall trying to figure this out.  I am trying to figure out the minimum and maximum value for a single row.  I have added the values from three rows of a two dimensional array into a fourth row and I want to get the minimum and maximum value from the row but I can't seem to figure it out.  The code below gives me weird results.  I set my min and max at [3][0] because I only want to scan row 3.  Thanks for the help.

int min = sales[3][0];

      for (int row = 3; row < sales.length; row++)
            {
                  for (int column = 0; column < grades.length; column++)
                  {
                        if (sales[row][column] < min)
                        min = sales[row][column];
                  }
            }

      //Maximum
      int max = grades[3][0];

      for (int row = 0; row < sales.length; row++)
      {
            for (int column = 0; column < sales.length; column++)
            {
                  if (sales[row][column] > max)
                  max = sales[row][column];
            }
      }