Service Tax Salary reimbursement to Outsourcing Expenses

Hi,

I am working in a private limited company where we have given some data entry work to some outsiders. They are submitting bills as below:

Salary Reimbursement           Rs.100000

Service Charges                       Rs.10000

Service Tax ( @ 10.3%)              Rs.11330

My query was whether service tax to be charged on full amount i.e,1,10,000 or service charges amount only i.e, Rs.10,000

Please suggest me on above matter