Need help using sum in a SQL query

Hi Experts,
I have a table in my SQL Server 2008 db that holds payment records. My table currently stores about 250,000 records.  Some of the columns in my table are PaymentType, PaymentCode, and PaymentAmount.  I want to get a sum of the PaymentAmount based on the various PaymentType and PaymentCode groupings. Do I need to use a Case Statement?  How can I accomplish this?  Below is a sample of the raw data, and what I want the out should be.  Thanks in advance.

Raw Data Sample:
PaymentType      PaymentCode      PaymentAmount
CR            PD            $10.00            
CR            FI            $35.12
CR            FI            $23.99
CR            PD            $25.20
CR            PD            $20.00      
CR            PD            $35.00      
HE            CH            $40.00
HE            CH            $15.00


RESULT SHOULD BE:
PaymentType      PaymentCode      Total            
CR            FI            $59.11
CR            PD            $90.20
HE            CH            $55.00

Thank you,
mrotor