All - Great board with excellent information.

I am looking for help how to sum data for a certain scenario. I have a table
of raw data information similar to below. I am trying to put together
formulas on another worksheet with columns of months and rows of Accts and
sum Col C for the row/col combination. Can anyone help? Thanks!

Col A Col B Col C
200601 AcctA $1
200601 AcctB $2
200602 AcctB $3
200603 AcctA $4
200603 AcctB $5