The structure of the file prevents direct addition of the SrcAmount values. Each column contains too much information. You need to separate the Src from the SrcAmount. This can be done in a Reformat component using string functions
like replace() and split(). I attached an example graph, where you can find the Reformat component (renamed to Parse & Count in this example) which contains commented code (in the Transform property). Output of this component is the result of the addition.
Hope this helps,