Purchase a service / work

Purchase a service / work

Hi,
 
we use service desk plus. I wondered if there was a way to add an item to a purchase order that's not an actual asset but needs to be placed on a purchase order none the less.
 
I can work around this by adjusting the price of the order and entering something in the remarks section but it would be more useful if I had away of actually entering the details of the work or service as an item on the purchase order.
 
 
thanks

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