PO Invoice ..blocked due to Price Variance
I would like to know that how we can create a PO invoice if Purchasing document already exists. I would like to craeate this invoice such a way that it should have the price variance. Also how this invoice gets blocked and when we can unblock this. What all Tables are updated during this whole process?
Also if any one could provide me documents on PO invoices where in the general business process is explained in layman's term then it would be a great help.
Thanks in advance,