Set 'Zero Tax' for subtotal under $110 - Woocommerce - wordpress

Question

I'm trying to setup no tax for orders under $110.
I bumped into this thread Set different Tax rates conditionally based on cart item prices in Woocommerce and tried it but doesn't seems to work when i add it on functions.php - Maybe because some of the codes are outdated?
Here's the revised code:
add_action( 'woocommerce_before_calculate_totals', 'change_cart_items_prices', 10, 1 );
function change_cart_items_prices( $cart ) {
if ( is_admin() && ! defined( 'DOING_AJAX' ) )
return;
if ( did_action( 'woocommerce_before_calculate_totals' ) >= 2 )
return;
foreach ( $cart->get_cart() as $cart_item ) {
// get product price
$price = $cart_item['data']->get_price();
// Set conditionaly based on price the tax class
if ( $price < 111 )
$cart_item['data']->set_tax_class( 'zero-rate' ); // below 111
if ( $price >= 111 )
$cart_item['data']->set_tax_class( 'standard' ); // Equal above 110
}
}
I believe Standard & Zero rates tax options in Woo commerce > Settings > Tax are setup correctly.

Answer 1

Got it working using this code:
add_action( 'woocommerce_before_calculate_totals', 'apply_conditionally_zero_tax_rate', 10, 1 );
function apply_conditionally_zero_tax_rate( $cart ) {
if ( is_admin() && ! defined( 'DOING_AJAX' ) )
return;
if ( did_action( 'woocommerce_before_calculate_totals' ) >= 2 )
return;
$defined_amount = 110;
$subtotal = 0;
// Loop through cart items (1st loop - get cart subtotal)
foreach ( $cart->get_cart() as $cart_item ) {
$subtotal += $cart_item['line_total'];
}
// Targeting cart subtotal up to the "defined amount"
if ( $subtotal > $defined_amount )
return;
// Loop through cart items (2nd loop - Change tax rate)
foreach ( $cart->get_cart() as $cart_item ) {
$cart_item['data']->set_tax_class( 'zero-rate' );
}
}