Kapacitor joining series with different time steps

For example say I want to add together measurements A B and C in a 5 second window. Every 5 seconds I want to output a new point regardless of whether or not A B or C updated, however if any of them did update then incorporate the new data into the calculation.

The reason I need to do this is because the data I am gathering is dead banded to only output if it meets a certain threshold of change causing the data intervals to be somewhat random.