Freight value in the material cost after GRN

Whenever we are creating a PO if we are not mentioning the freight in the PO condition, the freight is not getting added to material cost

I would like to know a process where in after doing the GRN, the freight value to be added to the material cost.

or Is there any process where we can book the freight at the time of MIRO and

at the freight value to the material cost.

Pls do the needful