You can add while invoicing.
Go to sale >> invoice.
Click + create.
Choose the material.
Click Add +.
There is a transport & freight tab in the item table.
Enter the amount.
Click save.
You can add while invoicing.
Go to sale >> invoice.
Click + create.
Choose the material.
Click Add +.
There is a transport & freight tab in the item table.
Enter the amount.
Click save.
Read more about it here