Is it possible to display a tiered discount progress bar on the POS cart UI?

I’d like to know if it’s possible to show an incentive or tiered discount progress bar on the POS cart interface.

For example:

  • Add 2 items → get 20% off

  • Add 3 items → get 40% off

  • Add 6 items → get 80% off

The idea is to display a dynamic message or progress bar inside the POS cart, encouraging customers to add more items to unlock higher discounts.