biennial service contract for the job for coal mill rejection and assistance in misc . jobs of operation department including equipment cleaning ( unit 1 , 2 , 5 ) . , biennial service contract for the job for coal mill rejection and assistance in misc . jobs of operation department including equipment cleaning ( unit 1 , 2 , 5 ) . , labour cost for 1st year . [ listed worker-26 heads , non-listed worker-6 heads , no-category worker-13 heads , own employee-4 heads , supervisor-1 head ] , labour cost for 2nd year upto jan-2022 workers . [ listed worker-26 heads , non-listed worker-6 heads , no-category worker-13 heads , own employee-4 heads , supervisor-1 head ] , labour cost for 2nd year from feb-2022 workers . [ listed worker-25 heads , non-listed worker-6 heads , no-category worker-13 heads , own employee-4 heads , supervisor-1 head ] . , tools , tackles , liveries & consumables , cost of ppe , profit including other charges , gst