The total charges for shipping are mentioned on the product page from where you place a bid. This amount varies from product to product and is to be paid additional to the winning bid amount. You will be billed for the price at which you win the auction plus the shipping charges.
What are the shipping charges if multiple quantities are chosen?
If the bid is for more than one quantity of the same product, the shipping charges are multiplied per unit basis. E.g. one quantity shipping charge is Rs.50/-. Two quantities of the same item would be 50*2 = Rs.100/-.