This is a companion discussion topic for the original entry at https://mecsimcalc.com/app/1569496
Wow, this is very cool. It will definitely come in handy for my electricity bill! 
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it looks good that let a family know how much electric energy consumed every month on average! several suggestions I would put forward. one is input hours, the increment is too small. when click the upper arrow or down arrow, the hour number increases or decreases too slowly. The other is that energy consumption unit is kWh, so total consumption each month 720 kWh, not kW.