price of woocommerce products with zeros in cents

Hi all,
When I need to show price of woocommerce products I do like:

$woocommerce_price_format= get_woocommerce_price_format();
            $currency_symbol= get_woocommerce_currency_symbol( get_woocommerce_currency() );

            sprintf($woocommerce_price_format, $currency_symbol, !empty($next_product['_regular_price']) ?

it works, but I want get “$6.90”, but not “$6.9” and “$6.00”. Which is the best way for this to follow to WooCommerce > Settings > General > Currency Options rules?

WooCommerce 2.4.7. WordPress 4.3.1
Thanks!