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CVCLT
The problem being not everyone wants this data, and if they did want some of it, they would want it in a slightly different form. To answer your first 2 questions you could take your account balance at any point in time, add on any direct debit payments and then subtract your end point balance, the result would be your spend over the designated time period.
Electricity usage is easy -its the difference between any two accurate readings. For gas you could take the difference in readings an then multiply that by a conversion factor to give kWh. My meter is imperial so I use 31.6, for metric meters that would be 11.24. This would not give you a truly accurate figure as the gas calorific value wanders over time but for most people it would be close enough.
I only really track consumption, it the thing i have some degree of control over. But I also calculate my rolling 12 month consumption , particularly of gas, and i find it interesting how much the rolling figure varies over time due primarily to the weather,which i can't control, but a factor which one Kier Starmer claims he will get ahead of!