210 or 175?

transcript

One delivery. A base fee of 70. Three fee rules on top. Wrap them one way, you pay 210. Wrap them another way, 175.

Surge on the outside gives 210. Surge on the inside gives 175. Same rules. 35 rupees apart.

The call goes in from the outside. Surge asks late night, asks small cart. The base says 70. Then the answer goes back up. Small cart adds 15. Late night adds 20. Now surge doubles all 105. That's 210. The add-ons got doubled too.

Move surge to the bottom. It sits right on the base. It doubles only the 70, to 140. Nothing else exists yet. Then 15 and 20 are added on top, once each. That's 175.

Outside: 70 plus 35 is 105, doubled, 210. Inside: 70 doubled is 140, plus 35, is 175.

Neither order is a bug. It's a rule. Make it visible. Test it.

Full breakdown in the lecture.