public function __construct() {
		$this->session          = new WC_Cart_Session( $this );
		$this->fees_api         = new WC_Cart_Fees( $this );
		$this->tax_display_cart = $this->is_tax_displayed();

		// Register hooks for the objects.
		$this->session->init();

		add_action( 'woocommerce_add_to_cart', array( $this, 'calculate_totals' ), 20, 0 );
		add_action( 'woocommerce_applied_coupon', array( $this, 'calculate_totals' ), 20, 0 );
		add_action( 'woocommerce_cart_item_removed', array( $this, 'calculate_totals' ), 20, 0 );
		add_action( 'woocommerce_cart_item_restored', array( $this, 'calculate_totals' ), 20, 0 );
		add_action( 'woocommerce_check_cart_items', array( $this, 'check_cart_items' ), 1 );
		add_action( 'woocommerce_check_cart_items', array( $this, 'check_cart_coupons' ), 1 );
		add_action( 'woocommerce_after_checkout_validation', array( $this, 'check_customer_coupons' ), 1, 2 );
	}