Single PO for multiple PR

Hi,

Can you explain the process for making single PO ref. to multiple PR, I have 5 PR, 5000001 TO 5000004, for material 1 , 100 , 1001 , 5642 , 456.

Now for this 5 different PR i want to make single PO. from one vendor only, can you explain or give any link with T. code for this.

regards,

zafar