"You're only x away from free shipping" notice

free_shipping_notice.php

function na_woo_free_shipping_notice() {
	if ( is_plugin_active( 'woocommerce/woocommerce.php' ) ) { // Check whether Woo is active
		$location = WC_Geolocation::geolocate_ip(); // Get location data via MaxMind Geolocation
		$country = $location['country']; // Get the country from MaxMind data
		switch ( $country ) { // Check what the country is
			case "BE": // If it's Belgium...
         	$min_amount = 100; /// ...then apply this amount...
         	break;
      		case "DE": // ...etc.
         	$min_amount = 150;
         	break;
      		default: // Standard minimum
         	$min_amount = 60;
   		}
		$current_subtotal = WC()->cart->subtotal; // Check the cart's subtotal
		if ( $current_subtotal < $min_amount ) { // If the subtotal is less than the minimum...
      		$message = 'You're only ' . wc_price( $min_amount - $current_subtotal ) . ' away from free shipping.'; // Message with calculation and correct formatting
      		echo '<p class="na-woo-free-shipping-notice">' . $message . '</p>'; // ...show the text as a paragraph
   		}
	}
}