calculateTotalBill.js

/*

We need a function called `calculateTotal` that will accept an array of numbers, then add them all up and return the total.

`hint` - maybe take a look at https://www.w3schools.com/js/js_loop_forin.asp .

Here are some examples that sound work:

Example 1:

const items = [
  10,
  25,
  35,
]

> calculateTotal(items)
70

--------------
Example 2:

const items = [
  5.5,
  100,
  34,
]

> calculateTotal(items)
139.5

--------------
Example 3:

const items = [
  25,
  100,
  -10, // this could be a discount
]

> calculateTotal(items)
115

*/