P4312 and Landed Cost - OV as Summary v/s Details

Is there any way to record receipts in detail but apply landed cost as a summary ?

For example, the supplier invoice will be for 1000 EA, but each vehicle may carry 50 EA. So we will record receipts by 50 EA to record vehicle info but we apply landed cost at once for the 1000 EA.

Edit 1:

Usually, what is the best practice to enter landed cost in the above scenario ?. At what point we should enter the landed cost ?

I hope we should have all the costs before the item arrive at the warehouse.