hi joanhon,
the menu for lunch & hi-tea is a difference of $10 becos of the items, and thats the standard price.
I played cheap & ordered the hi-tea as lunch for my guests, as the items are quite filling, with fried noodles, fried chix wings, fried carrot cake, assorted dim sum, mini sandwiches, spring rolls, assorted fruits. Thats more than enough & the dim sum was gone in the shortest time.
U can try to negotiate a lower price or exclude some items from the menu.
Either way, try to negotiate with them, i believe most of the hotels does leave some room for negotitaion..