Help working with charts?

[rig doctor]

I have an Insteon wireless thermostat controlling a window unit with an appliance module. Programming and everything works great but i am trying to figure out if i can easily see on and off times without having to do all the math while reading the (status) chart. If i can easily chart how long the unit runs per day it will be helpful in tweaking the temperatures in the room to help save a little energy cost.