Coupons calculations are wrong

### WordPress Environment ###

Home URL: https://bordeauxselect.com
Site URL: https://bordeauxselect.com/wordpress
WC Version: 3.1.2
Log Directory Writable: ?
WP Version: 4.8.1
WP Multisite: –
WP Memory Limit: 512 MB
WP Debug Mode: –
WP Cron: ?
Language: fr_FR

### Server Environment ###

Server Info: Apache
PHP Version: 5.6.31
PHP Post Max Size: 64 MB
PHP Time Limit: 300
PHP Max Input Vars: 16000
cURL Version: 7.38.0
OpenSSL/1.0.1t

SUHOSIN Installed: –
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### Database ###

WC Database Version: 3.1.2
WC Database Prefix: ######
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woocommerce_tax_rates: ?
woocommerce_tax_rate_locations: ?
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woocommerce_payment_tokenmeta: ?
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### Security ###

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### Active Plugins (27) ###

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### Settings ###

API Enabled: –
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Currency: EUR (€)
Currency Position: right
Thousand Separator:
Decimal Separator: ,
Number of Decimals: 2
Taxonomies: Product Types: external (external)
grouped (grouped)
simple (simple)
variable (variable)

Taxonomies: Product Visibility: exclude-from-catalog (exclude-from-catalog)
exclude-from-search (exclude-from-search)
featured (featured)
outofstock (outofstock)
rated-1 (rated-1)
rated-2 (rated-2)
rated-3 (rated-3)
rated-4 (rated-4)
rated-5 (rated-5)

### WC Pages ###

Base boutique: #21 – /
Panier: #22 – /panier/
Commande: #23 – /commande/
Mon compte: #24 – /mon-compte/

### Theme ###

Name: Bordeaux Select Child of StoreFront
Version: 2017.03.24
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Parent Theme Name: Storefront
Parent Theme Version: 2.2.5
Parent Theme Author URL: https://woocommerce.com/
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### Templates ###

Overrides: –

• This reply was modified 7 years, 2 months ago by silvere.

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.

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 7 years, 2 months ago by silvere.

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.

No, the coupon is correct.

As you can see on this other screen shot https://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.

This bug has been fixed in recent update of WooCommerce.