class Storage {
    constructor(capacity) {
      this.capacity = capacity;
      this.storage = [];
      this.totalCost = 0;
    }

    addProduct(product) {
      this.storage.push(product);
      this.capacity -= product.quantity;
      this.totalCost += product.price * product.quantity;
    }

    getProducts() {
      return this.storage.map((product) => JSON.stringify(product)).join('\n');
    }
  }