Wrong Total Price

[hacib]

Hi,

I have a website https://flowerlink.net/bahrain/ , recently i'm getting errors, for the product total

for example if my flower is 10$ , (+ 2$ for shipping) it should show 12$) but it's showing always some extras, but when coustomers goes to payment page of 3rd party, it will show the exact price, but the wrong total price showing on order page is not good, i'm not able to solve the issue 

 

I have attached the screenshoots

I'm using PRestashop 1.6.1.18 (i even tried to update to latest 1.6.1.23) but then the order page is not showing

Kindly help, i'm loosing coustomers

 

Regards