不知道如何通过循环进行迭代

我正在编写一个像购物车一样的程序。我要从专辑类继承5个专辑对象。Album类为专辑的数量生成一个随机数。我还应该创建一个Cart类。我的初始金额是1000美元。我要编写一个循环，遍历我的专辑数组，并购买每一张专辑，直到我没有足够的钱或没有更多的特定专辑。当我遍历专辑时;如果我有足够的钱，专辑是可用的，然后我购买它，扣除的钱，并把它添加到购物车。我的循环真的很困难。任何建议都将不胜感激。现在，我的循环只对albums数组进行了一次迭代，这就给我留下了大约800美元的剩余。很明显，这不是我想要的。我试着嵌套一个循环，但我仍然失去了逻辑。这是我的代码…

   /** Program Description: This program simulates purchases using a 
 * loop. The program creates two classes; an album class, and
 * a cart class. The initial amount of money is $1000.00. The program
 * iterates through all the albums and purchases each one, as
 * long as there is money left. Every time an album gets purchased 
 * the initial amount of money is decremented by the purchase
 * price. Each time an item is purchased, it gets added to the cart.
 * The program then displays all the items purchased in the cart.
 * It should show the album name, artist name, quantity purchased,
 * and sub total for each. It then shows the total purchase price,
 * and the amount of money left over  
 * 
 *  Pseudocode:
 *  
 *      Create a constructor for Album object
 *      Create classes that inherit from Album
 *          Store these classes in an array
 *      Create a constructor for Cart object
 *      Create a const variable for initial money
 *      Loop to simulate purchases
 *          Iterate over an array of albums
 *          Purchase each one as long as there is money left
 *          Decrement money by purchase price
 *          Add item to cart
 *      Display info                                                    **/
// Create a constructor for Album class
        function Album(title, artist, price){
            this.title = title;
            this.artist = artist;
            this.price = price;
            this.date = new Date();
            this.quantity = Math.floor((Math.random() * 10) + 1);
        };
        Album.prototype.purchase = function(){
            this.quantity--;
            if (this.quantity > 0){
                return 1;``
            }
            else{
                return -1;
            }
        };
    // Create objects that inherit from Album
        var pimpAButterfly = new Album("To Pimp a Butterfly", "Kendrick Lamar",  29.99);
        pimpAButterfly.tracklisting = ["Wesleys Theory", "For Free", "King Kunta", "Institutionalized", "These Walls"];
        var blameItAll = new Album("Blame It All On My Roots", "Garth Brooks", 29.98);
        blameItAll.tracklisting = ["Blame It All On My Roots", "Neon Moon", "Papa", "Thunder Rolls"];
        var killLights = new Album("Kill the Lights", "Luke Bryan", 20.83);
        killLights.tracklisting = ["Kick the Dust Up", "Kill the Lights", "Strip it Down", "Home Alone Tonight"];
        var platinum = new Album("Platinum", "Miranda Lambert", 20.61);
        platinum.tracklisting = ["Girls", "Platinum", "Little Red Wagon", "Priscilla", "Automatic"];
        var painKiller = new Album("PainKiller", "Little Big Town", 24.99);
        painKiller.tracklisting = ["Quit Breaking Up With Me", "Day Drinking", "Tumble and Fall", "Painkiller"];
    // Store these objects in an array
        var albums = [pimpAButterfly, blameItAll, killLights, platinum, painKiller];
    // Create a constructor for Cart class
        function Cart(val){
            this.items = [];
        };
        Cart.prototype.add = function(val){
            this.items.push(val);
        };
        Cart.prototype.remove = function(val){
            this.items.splice(albums.indexOf(val), 1);
        };
    //Create a constant variable for initial money
        var INITIAL_MONEY = 1000.00;
    // Create an instance of the Cart object
        var cart = new Cart();
    // Loop to simulate purchases
        var i = 0;
        while(INITIAL_MONEY > 0){
i = 0;

while(i < albums.length){
        //Purchase each one as long as there is money left
        if (INITIAL_MONEY >= albums[i].price){
            albums[i].purchase();
            //Decrement money by purchase price
            INITIAL_MONEY = INITIAL_MONEY - albums[i].price;
            //Add item to cart
            cart.add(albums[i]);
        }
        i++;
    };
};

console.log (INITIAL_MONEY);

        console.log(INITIAL_MONEY);
    //console.log("Album Name'tArtist Name'tQuantity'tSubtotal");