I can't solve the "Super Sale" mid-level problem

Question

I'm stuck on this task. I don't understand why the fourth and seventh tasks failed
https://sololearn.com/compiler-playground/cRCLO7yp0Xlt/?ref=app

Answer 1

Revise the concept you have been learning throughout the course

Answer 2

The output should be rounded with the floor method.

Answer 3

Solved