according to price tag law.
"Section 2. One Price Tag Requirement. Every retailer is required to display a price tag to indicate the price of each consumer good and/or services, as required in Articles 8.1 to 83 of the Consumer Act of the Philippines or R.A. No. 7394. The price tag must be written cle,arly, indicating the price of the consumer product including Value Added Tax (VAT) whenever the consumer product is VA TABLE. Service charge, if any, shall not be included in the price tag.» (Underline supplied for emphasis)
that is applied to any goods/services. so if you see one, just report it to DTI.