I have resumed my blog from today :) - and will try to introduce as much functionalities as I can. Going through Dynamics AX, I came across with a price details functionality both available in Sales and Procurement side.
To enable the functionality,
For Purchase Orders: Navigate to Procurement & Sourcing > Setup > Procurement & Sourcing Parameters > Prices > Enables Price Details
For Sales Orders: Navigate to Accounts Receivable > Account Receivable Parameters > Prices > Enable Price Details