Quick Tipper n' Splitter

To-do:

• Reactive calculator. All variables updated in real time, no need for 'confirm' buttons.

• Visible functionality:

  1. Total cost (of the food)
  2. Tip (to waitres...). (Text on bottom like "Default is 10%") (% of total)
  3. Divide. To how many people the sum should be divided? (eg. people who eat)
  4. Sum for each person who eat
  5. Refactor (in a separate js) to use Destructuring, just for fun!
  6. Refactor (in a separate js) to use For of instead of Array.forEach, just for fun!

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