Work contract

Hi, I am Water Proofing Applicator from Bangalore Karnataka, buying the materials from manufacture and applying to the clients place and raising consolidated bill as per agreed rate per sq. ft / mts. The Manufacture charges me VAT @ 14.5% and Exicse Duty @ 12.36% Now how do I charge them the tax. Do I have to charge VAT @ 14.5% and 12.36% Service Tax on 70% & 30% respectively. Can I Set off the VAT & ST with the amount paid. Ananda Theertha sbat2012 @ gmail.com +91-9845324012