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Formula to know the average cost of the last 12 months expenses

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    Formula to know the average cost of the last 12 months expenses

    Hi everyone!

    I would like to know what is the formula to know the average cost of the last 12 months for each expenses that I have with the current month and that keeps the last 12 months average as the months go by?

    To be more precise and for example: now we are in January 2021, I would like to know the average cost from January 2020 to December 2020 for "Assurance auto" (A2 in the "Budget" tab). The amounts of the expenses are in the "Dépenses" tab.

    Thanks in advance for your response and let me know if my query is not clear enough. Have a good day/evening!

    P.S.Sorry for those who can't read french, the file is in french but the dates are formatted in english and for the cost column, it's pretty much universal . I've modified the average column in english (column C in "Budget" tab) to let you know where I want to put the formula.
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    Last edited by Goodvibe; 01-11-2021 at 06:28 PM.

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    Forum Contributor arlu1201's Avatar
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    Hello Goodvibe,

    Welcome to Excelforum. Be a part of large Excel community. Enjoy Learning.
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    Re: Formula to know the average cost of the last 12 months expenses

    Hi Arlu1201!
    Thanks for the welcoming and kind words .! Best of success to you on your personal projects!

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    Re: Formula to know the average cost of the last 12 months expenses

    Hello Goodvibe and Welcome to Excel Forum.
    You have posted a question in a forum that is used for making introductions.
    Please repost in one of the forums listed at the link below:
    https://www.excelforum.com/microsoft...el-help-forum/
    Let us know if you have any questions.
    Consider taking the time to add to the reputation of everybody that has taken the time to respond to your query.

  5. #5
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    Re: Formula to know the average cost of the last 12 months expenses

    Hi JeteMc!Oups! My mistake! As you propably figured, the newbie didn't know that he was in the welcoming forum lol :P. Thanks for letting me know. Take care!

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