Receiving Inventory - Depreciation
Upon receiving an item, the Receive screen allows you to enter the cost as well as the Life and Salvage Value for the asset in question.

The Life will default to the value you entered at the product level, but can be changed at the time of receiving new inventory.
The Salvage Value will become the salvage % which you entered at the product level, but this too can be changed at the time of receipt. Note that this amount here is in dollars.