Gst on labour contract

A LABOUR CONTRACT SUPPLY WORKERS TO MY ORGANIZATION FOR WHICH HE RAISED BILL AS FOLLOWS:

1. MANDAYS                     200               Rs.400/-per mandays             80000.00

2. Add.:CPF 12%                                                                                 9600.00

3. Add.:ESI 3.25%                                                                               2600.00

4. Add. 7% Commission on -1                                                              5600.00

                                                            Total                                     97800.00

My question is on which amount GST will be calculated?  Someone says GST will be calculated on Commission only but someone says Mandays+Commission. Please suggest.