Is it possible to cancel a Goods Receipt?

Hi everybody.

I use SAP B1 2008.

I know we can cancel certain documents in SAP after they have been posted.

Ex. We can cancel a Sales Order by Selecting Data -> Cancel from the menu.

Is it possible to cancel a posted Goods Receipt (or a Goods Issue)?

I don't find any "Cancel" menu.

The only way I can cancel a Goods Receipt is to raise an identical Goods Issue.

But this method has its problems:

As we adopt a FIFO method of stock valuation, we cannot impose our chosen issue price. It is the system which calculates it.

Hence, we may end up with an issue price which does not cancel with the receipts price.

Can anybody suggest ideas to work around this difficulty?

Thanks

Leon Lai