class Storage {
    constructor(capacity) {
        this.capacity = capacity;
        this.totalCost = 0;
        this.storage = [];
        this.addProduct = (input) => {
            this.storage.push(input);
            this.capacity -= input.quantity;
            this.totalCost += input.quantity * input.price;
        }
        this.getProducts = () => {
            return this.storage.map(x=>JSON.stringify(x)).join('\n');
        }
    }
}