Is there any method besides Landed Cost Extract of calculating and applying PO/Voucher price varianc

We are currently on 9.2 Image 5 and using Perpetual Weighted Average for Inventory.

An Item's Item Cost is updated as expected with an express putaway. According to PeopleBooks, if we are using Perpetual Averages and the voucher cost is different than the PO cost, there will be an adjustment to the item cost. Users have tried various scenarios and are not seeing any changes/adjustments to the item cost.  My research seems to indicate we should be running the Landed Cost Extract in order to calculate the variance and adjust item costs accordingly. However, this process is not part of our established process and never has been since our upgrade consultants configured our application