[T-SQL] Help with LastBuy price of an item

I have these tables:

Item:
Name | SellPrice
---------------------
A | 100
B | 200
C | 300

And a table of buyitem details
ItemName | BuyPrice | Date
------------------------------
A | 50 | 1-1-2011
A | 75 | 1-2-2011
B | 150 | 1-1-2011
B | 125 | 1-5-2011
C | 270 | 1-1-2011
C | 260 | 2-8-2011

How can I know each item last buy price? So I can make a table like this:
Name | SellPrice | Last Buy Price
--------------------------------
A | 100 | 75
B | 200 | 125
C | 300 | 260

I don't have any idea on how to make the queries for this result. I hope someone can help me..

Thanks before..