async totalPrice(oCartEntries) {
			let fTotalPrice = 0;
			Object.keys(oCartEntries).forEach((sProductId) => {
				const oProduct = oCartEntries[sProductId];
				fTotalPrice += parseFloat(oProduct.Price) * oProduct.Quantity;
			});

			return (await this.requestResourceBundle())
				.getText("cartTotalPrice", [formatter.price(fTotalPrice), "EUR"]);
		}
Sums up the price for all products in the cart
@param {object} oCartEntries current cart entries
@returns {string} string with the total value