Can't change WooCommerce cart total

Question

  add_action( 'woocommerce_calculate_totals', 'woocommerce_calculate_total', 10, 1 ); 
    function woocommerce_calculate_total( $cart ) {
    if($cart->subtotal < 300){
        $cart->subtotal += 85;
        $cart->total += 85;
    }
}

This piece of code seems to work fine but only for subtotals. $cart->total always returns 0 no matter what and its lower than subtotal. I've also tried $cart->cart_contents_total , it returns proper value but i cant change it. WP version is 5.3.2 and WC is 3.8.1.

Answer 1

You can use:

add_action( 'woocommerce_after_calculate_totals', 'woocommerce_after_calculate_totals', 30 );
function woocommerce_after_calculate_totals( $cart ) {
if($cart->subtotal < 300){
        $cart->subtotal += 85;
        $cart->total += 85;
    }
}