Cost Calculation Improvements:?

Short answer: If the coffee is highly customizable, you could add additional logic to the Cost() method to calculate discounts or offer combo prices (e.g., a discount when multiple ingredients are added).

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.