How to round prices to 10 cents
To file functions.php of the current wordpress theme add next code:
add_filter('woocs_raw_woocommerce_price', function($price) {
return round($price * 10, 0) / 10;
});
add_filter('woocs_woocommerce_variation_prices', function($price) {
return round($price * 10, 0) / 10;
});