Code-Snippets-Functions/Execute a function on a child site/WooCommerce/round-cart-subtotal.txt

function filter_woocommerce_cart_subtotal( $subtotal, $compound, $cart ) {
    // Rounds a float
    $round_num = round( $cart->subtotal / 0.05 ) * 0.05;
    
    // Format a number with grouped thousands
    $number_format = number_format( $round_num, 2 );
    
    // Subtotal
    $subtotal = wc_price( $number_format );

    return $subtotal;
}
add_filter( 'woocommerce_cart_subtotal', 'filter_woocommerce_cart_subtotal', 10, 3 );