How to get po delivered value and po invoived value?

HI experts,

i need to create bex query with PO total value,  PO NET VALUE Item wise, po delivered value,

po still remaining value and po invoiced value.

AFter extensive search i got 0net_po_val for PO net value item wise.

Remaining 4. Fields am unable to search in bw targets. So how to proceed?? Any inputs?

Thanx in advance.

br,

Ravi kiran