Hi I am looking for a little guidance on what formula to use. Basically what I need to do is keep a take a sum of a column and somehow take those results and move them into a monthly cumulative total. Im not sure where to begin.

The example below is what the setup is with (C5:C9 equalling the days of the week and how many referrals) (C10 is the sum of the week) ***(in C11, I just need to keep a cumulative total for the month)

# Referrals
Mon 2
Tues 3
Weds 4
Thurs 5
Fri 5
Week 14
Month