Soup Shop Inventory Management System Using Java

int sum = 0;
 
if(chkchicken.isSelected())
 {
   String chickensoup =  chkchicken.getText();
   int  price = 300;
   int  qty = Integer.parseInt(txtchk.getText());
   int tot = price * qty;   
   model = (DefaultTableModel)jTable1.getModel();
            
   model.addRow(new Object[]          
   {
     chickensoup,
     price,
     qty,
     tot 
    }        
   );    
  }
  if(chkveg.isSelected())
   {
     String vegsoup =  chkveg.getText();
     int  price = 300;
     int  qty = Integer.parseInt(txtveg.getText());
     int tot = price * qty;   
     model = (DefaultTableModel)jTable1.getModel();
            
      model.addRow(new Object[]          
       {
        vegsoup,
        price,
        qty,
        tot 
        }        
        );    
        }
   for(int i=0; i<jTable1.getRowCount(); i++)
     {
       sum = sum + Integer.parseInt(jTable1.getValueAt(i, 3).toString());  
     }
        
   txtbill.setText(Integer.toString(sum));

i have attached the video link below. which will do this tutorials step by step.