Cash Register: ive tried everything and its just not working

JavaScript
1

Tell us what’s happening:

Your code so far

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.132 Safari/537.36.

Link to the challenge:

2

i-can -see-n o-code-try-again