UOM in PO print

Dear All Expert,

I have one requirement.

My user procuring material from various vendor in kg, ton & etc.

My user requirement is whatever unit i have taken for purchasing it should be reflected in output or po print.

e.g suppose i maintain UOM as Kg for some material i am procuring that material in Tonne.

I am maitaining order unit as ton but as soon as i enter it changes to Base unit of measurement i.e Kg.

That is also ok.

But my client requirement, In PO print it should be shown as in Tonne.

Now, how to resolve this issue.

Please help me.

Thanks & Regards

SKK