[Community Puzzle] Self Checkout Machine

Coding Games and Programming Challenges to Code Better

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Created by @Rob-G,validated by @Laki_42,@Risodu and @jordan_codingame.
If you have any issues, feel free to ping them.

Maybe accept also this kind of answer?
Found:
2x1+1x0.5+1x0.2+…

Expected:
2X1+1X0.50+2X0.20
cause adding zeroes to 0.5 and 0.2… so dumb

There isn’t a way to accept multiple answers for any individual test case for a simple text puzzle (by “simple” I mean a puzzle where the referee is not customisable by the authors). The answers are always fixed.

just for anyone solving the problem its important to remember cash customers pay with will be added to the supply of money the machine has