average by year

  1. K

    Average Cells for the last 12 months only?

    I am wanting to average my electric bill for the past year only, but I want to keep all the history in excel. In my workbook, I have many sheets, but there are only two that matter. "Sheet1" is the main sheet where the formula will be listed, the other sheet, "OG&E" is where the billing history...
  2. T

    To calculate monthly and yearly gas usage between 2 random dates.

    <tbody> A B C Date Electricity (kWh) Gas (kWh) 6/26/10 4535 21747 21/12/10 6878 26787 5/5/11 8900 29001 9/10/11 10200 32901 1/2/12 14800 36980 2/7/12 18221 39001 12/27/12 19011 44012 </tbody> Hello, I would like to calculate monthly and yearly gas and electricity...
  3. D

    Need Flexible Average based on Year

    Hi, I am in need of modifying the existing average formula in H6 to allow user input as shown. That is user picks number of years to average and the starting year along with which equipment. I would like to keep the SUMIF/COUNTIF construct to avoid all errors if possible. Baseline Comps...

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