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Thanks.
Záleží podle použité šablony, ale pokud je použita taková, která respektuje WooCommerce plugin, tak něco ve smyslu:
price .amount {font-weight: bold;} nebo price .amount {font-weight: 700;}
1) Delete or rename the plug-ins in the ‘wp-content/plugins’.
2) Gradually reinstall or back titles.
3) For me to localhost and WordPress 4.5 has caused an error plugin “YITH WooCommerce Wishlist”.