If this is your first book, the chances are… No. Publishers generally have standard rates for books which are generally inflexible.
If you already have a track record of successfully publishing books, have worked with the same publisher on numerous occassions, or have something ‘very special’ to offer, there may be room for negotiation.
A publisher will hold a certain amount of royaties as a ‘reserve’ against books that are returned unsold by booksellers.
In the competitive world of bookselling, where publishers often have to offer concessions to booksellers in order to place books, deals are often arranged where seller offer to take a large amount of books on a ‘sale or return’ basis.