Program to calculate commission of salesman in Java

/*  Program to calculate commission of a salesman according to the given rate using Nested-if statement.
   Sales Value         Comm. Rate (%)
   0 to 5000           0 %
   5000 to 10000       5 %
   10000 to 20000      10 %
   20000 to 30000      12 %
   Above 30000         15 %
*/
class  CommissionNested
{
public static void main( String args[ ] )
{
   double sales, comm;
  
 sales = 12000;
   if( sales < 5000 )
   {
  comm = 0;
   }
   else 
 { 
  if( sales < 10000 )
    {
   comm = sales * 0.05;
    }
    else 
  { 
   if( sales < 20000 )
     {
    comm = sales * 0.1;
     }
     else
   { 
    if( sales < 30000 )
      {
     comm = sales * 0.12;
      }
      else
      {
     comm = sales * 0.15;
      }
   }
  }
 }
 System.out.println( " The Commission is = " + comm );
  }
}

Output:
The Commission is = 1200.0