Manual shipping plugin, Price per product rounding

-- HikaShop version -- : 2.4.0
-- Joomla version -- : 3.3.6
-- PHP version -- : 5.3.27
-- Browser(s) name and version -- : Chrome 41.0.2272.76 m

Hi,
Please help me in connection with the Price per product field of the Manual shipping plugin.
The rounding of Price per product and Price fields are working different.

From the same price 779.5 HUF will be using the Price per product field 989 HUF (27% tax)
(use of price per products activated, price field empty) and using the Price field 990 HUF.
(use of price per products deactivated)

Thank you for your help in advance.

Hi Nicolas,

Attached I send for both of the settings screenshots.
The first (admin/page-price) is with using of the Price field,
and the other (admin/page-price_per_product) is using of the Price per product field.

Thank you for your help in advance.

Hello,
Sorry for the late reply, I just tested it on my end and it worked fine, can you show me how did you configured the "Taxes" tab of the "Hikashop->System->Configuration->Main" ?

Hi Mohamed,

On main configuration page I have enabled the Floating tax prices function and this solved the problem.

Thank you for your help.