Discord post: Link

Recently I found a very bizarre yet consistent test failure on the Lua track, car-assemble exercise:

It was the only remaining test that wasn’t succesful. Here’s my code:

```
local cars = {}
-- returns the amount of working cars produced by the assembly line every hour
function cars.calculate_working_cars_per_hour(production_rate, success_rate)
return production_rate * (success_rate / 100)
end
-- returns the amount of working cars produced by the assembly line every minute
function cars.calculate_working_cars_per_minute(production_rate, success_rate)
return cars.calculate_working_cars_per_hour(production_rate, success_rate) // 60
end
-- returns the cost of producing the given number of cars
function cars.calculate_cost(cars_count)
return (95000 * (cars_count // 10)) + (10000 * (cars_count % 10))
end
return cars
```

It’s clear that there should be some kind of an error bar to eliminate such failures, as suggested by @iHiD on Discord.

Thanks!