Hi
Create new blanket purchase order (or if you need PO create new PO) then Function -> Copy Document. Now here you need to decide which document you want to copy. in your case is Quote (if you need to copy PO invoice then you select invoice, etc). Select Quote then from number select the Quote you want to.
Copy document has 2 below functions
Include header will copy the exact header info (vendor, etc).
Recalculate Lines which recalculate lines based on new info (new cost , etc)
