Open PO Report as on Date

HI Experts,

I need a Report of Open PO As on date.

Ex as on  1st April - PO quantity 100

  3rd April Quantity Receivd - 50

5th April  Quantity Received - 20

Means when i fetch the Repot on 4 April its shows 50 Quanity against open po. & on 6 April it shows 30 quantity against PO .

please guide me