fix(cash-register)-Fixed floating point bug on checkCashRegister function

[obafemitayor]

This PR fixed the floating point bug reported in this issue.

Testing Strategy
https://www.loom.com/share/b4267e70f93442ea91c182710eb68d95

Checklist:

• I have read freeCodeCamp's contribution guidelines.
• My pull request has a descriptive title (not a vague title like Update index.md)

Closes #559

[obafemitayor]

@gikf Could you help review this PR if you have the chance please?

[camperbot]

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[naomi-lgbt]

It looks like the issue in the result object is still present.

[a2937]

Hi there. I think you should look at making sure the numbers that are displayed have a fixed number of digits.

Lastly to solve the negative coins in the drawer, maybe you should check to see if there's actually the proper amount of change in the drawer before you remove the coin. Like if there's actually a penny or dime, or if there's only a weird tiny spec that seems to registering as a little more than worthless.