Magento How do I set the product price to 4 decimal places

Question

For a UK or Europe store we have to show inc VAT prices. i.e. a product selling for £15.95 on the store front would be stored in the admin as £13.5744 - so that when the VAT(17.5%) is added it will make £15.95

Unfortunately Mag seems to only store the price to 2dp. Even is you enter 13.5744 in the admin for the price - you get 13.57 on refresh.

Is it possible to store admin product price in 4dp and at frontend we show on 2dp?.

Cheers,

Answer 1

From my understanding, you would need to take a close look at lib/Zend/Currency.php

Further investigating you would need to adjust the precision to 4 instead of 2:

http://framework.zend.com/manual/1.12/en/zend.currency.options.html
(edit: updated link to latest available version)

This thread has more details on implementing such as well, it looks as though Magento also does some price formatting else where also:

http://www.magentocommerce.com/boards/viewthread/16337/

app/code/core/Mage/Adminhtml/Block/Catalog/Product/Helper/Form/Price.php

return number_format($value, 4, null, '');

I know its not a definitive answer but hopefully leads you in the right direction.

Answer 2

There is also the function roundPrice() that might have been updated as well. This can be found in app/code/core/Mage/Core/Model/Store.php

Incase you are still stuck.