Vat + service tax invoice

Dear All; Our's is a manufacturing company. As per Clients requirements we arrange raw materials and put our labour / service to achieve the requisite product. My point of concern is, If we have arrange raw material, carry out modifications, engage our labour, which Invoice do we need to raise to the Clients. We are putting Raw Material means VAT / CST has to be applied but at the same time we are putting our labour which attracts Service Tax... Should I raise an Invoice where, I will be mention the Raw Material purchased + VAT to be charged and then Labour cost + Service Tax. Collaborating both activities and taxes in one single Invoice... Is this legally valid??? Please advice... Thanks in advance.