Vat/cst applicability

Dear All, Purchaser's office is located in Maharashtra. Pls answer for foll 2 cases- 1.Vendor is located at Rajasthan. Purchase order will be raised by purchaser on Rajasthan address but vendor will supply goods from his Maharashtra office/warehouse. What shall purchaser pay-Maharashtra VAT ot CST? 2.Vendor is located in Maharashtra,purchase order will be raised by purchaser on Maharashtra address but vendor will supply goods from his office/godown at chennai. Whether purchaser should pay Maharashtra VAT or CST? Kindly reply. regds, Sonal