Explain in more detail what metrics are being used in sum values

For example, what is sumConsensusBlockRewards? It would be helpful to know that it's metric A B and C summed. So that when I get an API response I can 1. Triple check the values are correct. 2. More easily separate them out.

Or, know that for example, a few data points are not returned in the response, but if I do sumConsensusBlockRewards - B , then I can get sum(A + C)