You can manually adjust inventory after closing work period, so if you keep a manual list of wastage items you can adjust off manually at the end of the day.
That doesnt help with tracking what was wastage and cost etc it will just adjust the stock level
Ive created a wastage system using tickets, wastage accounts and separate reporting so you can remove wastage immediately so no need to keep it written down on pieces of paper to adjust off a the end of the night etc
You can then run reports on what items were wasted and how much
The only thing i need to add is a separate price definition for each item for the cost value so that when entering wastage it uses this cost price list for the value and not the sale price
The basic principle is the same as a sale, so you add the item that needs wasting off, and pay that ticket using a wastage method of payment so the total wasted value sits in its own accounting, and that also reduces the inventory levels
Have a look youll be able to use or adapt to your needs, ill find the link now