CashAmount.js

class CashAmount {
  constructor(amount) {
    this.amount = amount;
    this.COINS = [ ['hundreds', 100],  ['fifties', 50],['twenties', 20], ['tens', 10],
    ['fives', 5],
    ['ones', 1],
    ['quarters', 0.25],
    ['dimes', 0.10],
    ['nickels', 0.05],
    ['pennies', 0.01]
    ]
  }

  totalInPennies() {
    return this.amount / 0.01;
  }

  addDoubleAmount(amount) {
    this.amount += amount;
  }

  quantityOfEachDenomination() { 
    var answer = {};
    var tempAmount = this.amount;
    for (var a = 0; a < this.COINS.length; a++) {
      var currentCoin = this.COINS[a];
      var divisor = Math.floor(tempAmount / currentCoin[1]);
      answer[currentCoin[0]] = divisor;
      tempAmount = tempAmount - (divisor * currentCoin[1]); 
      tempAmount = tempAmount.toFixed(2);
    }
    return answer;
  }

  toDouble() {
    return this.amount.toFixed(2);
  }

  toDoubleString() {
    return this.amount.toFixed(2).toString();
  }

}