Is it possible?

[hamid84]

To add shipping cost during the adding an item page?

Reason im saying is because on some items i want to charge fixed rate ( items which are shipped from supplier end )

and on some items i want to charge postage by weight ( items we stock ).

Or is there any other way to do it?

[kuroi]

This is not a core Zen Cart feature. There is a commercial mod (Ceon's advanced shipper) which deals with the issue of having different shipping methods for different products, though I don't know if it extends as far as displaying the rate for a specific product on its information page.