Q:

Adding values per unique customer together with sumif

I have a list of customers and values looking something like this
JeffJohnson, Coke, 2.5
JeffJohnson, Sandwich, 6
JennyWilson, Donut, 3

What I want is a list of total by customer looking like this
JeffJohnson, 8.5
JeffJohson, 8.5
JennyWilson, 3

I tried using =sumif (a:a, b1, c:c) but it is not working. 
I need it to work for quite a few lines without manually adding the query.
Any ideas?

A:

Your SUMIF() criteria need to change to A1 instead of B1. See below
=SUMIF(A:A,A1,C:C)

