In this tab, we can only modify the freight supplier code, for example, from 100057 to other vendors,

Enter vendor code 100060 in the first text box,

Click the Enter key,

Post,

Check the finance document of this material document,

The amount of materials in the purchase order is 1280 EUR; Freight accounts for 1%, so total amount is 12.8. 1280 + 12.8 = 1292.8, which is posted into the inventory account together, that is, freight is also included in the material cost.

By the way I got below useful information from internet.