Ok, Gordon… I had kind of gathered it could be “anything”. I was vaguely wondering which anything it was, and where we were supposed to find it, but never mind.
And by the way I strongly disagree with your previous statement that @ArjenEx told you to search the forum and in any way disrespected you. He was pointing you at a post which suggested ways to write a good post. That generally involves supplying sample test data (as you subsequently did) .
Anyway…
So you want this cumulative loss calculated in a single KNIME node. OK. I know you said you don’t really know Java and looking back you did ask if it could be done with a java script, so here you are:
If you would like to understand how that works… see the following post.