Coupons calculations are wrong

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  • Thread Starter silvere

    (@silvere)

    8 years, 9 months ago

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    • This reply was modified 8 years, 9 months ago by silvere.
    awodev

    (@awodev)

    8 years, 9 months ago

    Hello,

    I believe your product price price without tax is 5.26
    And your tax amount: 5.26 * 0.02 = 1.05
    This has a total including tax of 6.31

    Looking at your front end image, this is the total product price.

    If your price without tax was 5, then that total should be 6.

    The calculations make sense, assuming your price without tax is 5.26.

    Thread Starter silvere

    (@silvere)

    8 years, 9 months ago

    Thank you

    You are correct, but this does not explain point 2.

    Why does 0.26€ + 0.05€ ends up withe a total of 0.32€ and not 0.31€?

    • This reply was modified 8 years, 9 months ago by silvere.
    awodev

    (@awodev)

    8 years, 9 months ago

    Its one of those where it can go either way.

    5% of 5.26 = 0.263 => 0.26
    5% of 1.05 = 0.0525 => 0.05
    => this total comes to 0.31

    But if you take 5% of 6.31 => 0.3155 => 0.32

    So the coupon is being calculated on the different totals, and because of the rounding down when calculating the individual parts, something is lost. That is my guess anyway.

    If this is a coupon for just this product, and you want the discount to be 0.31, create a 4.9% coupon.

    Thread Starter silvere

    (@silvere)

    8 years, 9 months ago

    No, the coupon is correct.

    As you can see on this other screen shot http://bordeauxselect.com/_a_jeter/woocommerce/frontend2.png

    6.31 – 0.32 + 20 dos not make 26.

    Woocommerce does de write calculation, but displays it wrong.

    Thread Starter silvere

    (@silvere)

    8 years, 9 months ago

    This bug has been fixed in recent update of WooCommerce.

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