clustering
 

Hi,
I have following data in columns A and B. Column A is the average price
column B is the number of guests that paid this price
A B
4,5 10
4,6 8
5,2 1
7,2 2
7,4 4
9 2

I would like to count the guests that paid a price between 0 and 5 (10), 5,1
and 7 (1), 7,1 to 8 (6) and more than 8 (2). In my real problem have 1200
different prices with 250000 guests. I tried to use the histogram function
but that counted only the number rows and not the content of the column B.
How can I do this?

Thanks for your help