multi sipping cost add

i want add to paymet shipping cost more one in admin hikashop
and i want to choice one when i add product. how?

This is not possible. Shipping costs are for the whole order. Not for individual products in HikaShop.

ok how can i add total shipping price for more than one products order? especially duty and big products

For example, suppose that all your products weight 1kg, you can have such shipping methods:

from 0 to 1.5 => $5
from 1.5 to 2.5 => $10
from 2.5 to 3.5 => $15
...etc...