Price rules summary in Purchase and Customer forms

Hi !
First of all, I’m new here and I wanted to say how impressed I am with ERPNext. I really enjoy learning to use it.

To the point now : I created price rules to test custom prices by supplier for purchase orders and by customer for sales order.
In both cases, I didn’t find a way to consult prices in order to ajust quantity to reach the custom price. For example, we manage about a 100 suppliers and over 2000 items. Our procurement manager can’t remember the step in tier prices for each of them.
Is there something I missed to help them ?
Same problem for customers. I didn’t find a way to display negociated prices by customer on said customer form.
It would be very usefull to us.
Again, maybe I missed something…
Any help would be appreciated.
Thank you