Returning the most recent values

Good day to you all,

What would be the simplest way to display the following?

Say I have an assorted list of scores in one column (column A – person name, column B – score) and I would like to return the sum of the last two (or three, four, five etc) scores for each person (bottom of the list is the most recent):

Andrew 50
Carol 20
Ellen 10
Ben 10
Derek 45
Fiona 52
Ben 70
Derek 51
Fiona 61
Ben 21
Derek 81
Fiona 20
Andrew 90
Carol 43
Ellen 35
Ben 20

eg. In Columns C & D would display:

Andrew 140
Ben 41
Carol 63

and so on...



Thank you

Ks