Material purchase requisition - non stock - profit centre

Hi,

I am trying to create a Purchase requisition for material and would like to charge this to profit centre. These materials should be for consumption immediately and should not be added into stock. I tried using manual requisition ME51N however i am unable to input material code together with item category D and account assignment Y. I need to use material code to extract the price and description directly from the Outline Agreement.

Can anyone suggest what Tcode i can use or what fields do I need to change?

Thanks!