Running for trade goods

Hi experts,

I have a scenario where the company just procures an assembly A,which consists of Items(sub assemblies) B and C,Also B will have 9 components and C will have 20 components.I have to run MRP for item A and i should get the pr proposal for all items & components(B&C and down the level items) in one PR.The components are procured from out side.No sales order,no demand management.Is this possible?

Thimmayya