Access WC variables

functions.php

<?php
//* Get global WC object
global $woocommerce;

//* Access various WooCommerce cart variables, see also https://docs.woothemes.com/wc-apidocs/class-WC_Cart.html
$woocommerce->cart->get_cart_subtotal();
$woocommerce->cart->get_cart_tax();
$woocommerce->cart->get_cart_total();

//* Access various WooCommerce customer variables, see also @see https://docs.woothemes.com/wc-apidocs/class-WC_Customer.html
$woocommerce->customer->get_country();
$woocommerce->customer->get_default_country();
$woocommerce->customer->get_shipping_country();