Using Three Criteria To Return A Value

way to use three criteria - date, account, method - to identify values in a column of deposits to sum.

The spreadsheet consists of the following:

The first colomn is a mixed list of dates in different months deposits were made.
The second column is the account the deposits were placed in.
The third column is the method used to make the deposit
The fourth column is the amount deposited.

What I'm trying to achieve is
1. to sum all the deposits made in a particular month by the different methods into a summary cell for each month
2. to sum the amounts deposited into each account each month into a summary cell for each method

I did try to copy a section of the spreadsheet using the html maker but couldn't copy it.