calculate coins count for vending machine

coins-count.js

/**
 * Problem Statement
 *
 * Task Description

 A vending machine has the following denominations: 1c, 5c, 10c, 25c, 50c, and $1.
 Your task is to write a program that will be used in a vending machine to return change.
 Assume that the vending machine will always want to return the least number of coins or
 notes. Devise a function getChange(M, P) where M is how much money was inserted into the
 machine and P the price of the item selected, that returns an array of integers
 representing the number of each denomination to return.

 Example:

 getChange(5, 0.99) // should return [1,0,0,0,0,4]
 getChange(3.14, 1.99) // should return [0,1,1,0,0,1]
 getChange(3, 0.01) // should return [4,0,2,1,1,2]
 getChange(4, 3.14) // should return [1,0,1,1,1,0]
 getChange(0.45, 0.34) // should return [1,0,1,0,0,0]
 *
 * @param {number} amount
 * @param {number} price
 * @return {[]}
 */

function getChange(amount, price){
  amount *= 100;  // convert to cents
  price *= 100;   // convert to cents
  const availableCoins = [1, 5, 10, 25, 50, 100];
  const returnCoins = [];
  const toReturn = amount - price;
  let remaining = JSON.parse(JSON.stringify(toReturn));

  for (let c = availableCoins.length; c > 0; c--) {
    const coin = availableCoins[c - 1];
    let _ret = 0;
    if (remaining) {
      _ret = coinReturn(remaining, coin);
      remaining -= _ret * coin;
    }
    returnCoins[c - 1] = _ret;
  }

  function coinReturn(amount, coin, timesCoin = 0) {
    if (amount >= coin) {
      timesCoin++;
      return coinReturn(amount - coin, coin, timesCoin);
    }
    return timesCoin
  }
  return returnCoins
}

console.log(getChange(5, 0.99));
console.log(getChange(3.14, 1.99));
console.log(getChange(3, 0.01));
console.log(getChange(4, 3.14));
console.log(getChange(0.45, 0.34));