Exclusive and inclusive of service tax

Yes ajay

If bill amount is exlusive & ST is shown separately, you can take credit of that amount.

If the Service tax amount is included in the bill then also u can take credit.

in case of inclusive, then there must be certificate on invoice , that service tax is included in invoice, amount ...........

as without such certification, it may be treated as "service from exempted unit"

Service tax has to be seperately shown in the invoice for availing cenvat credit . If gross amount charged is inclusive of service and tax is not seperately shown, credit may be taken under proper intimation to department  with a copy of the conatract that specifically conatin provision for this. Best course is to have the bill that shows service tax.