Petition mandatory signage of goods and services to display manufacturing cost, mark ups and importantly tax attached to products

all goods and services will be required to display the amount of tax which is attached to said goods and services in percentage and cash value terms.along with the manufacture costs and number of mark ups and value associated with each product.
Hence if the base cost of a product is £1 but the public pay £3 then the other £2 would be accounted for and displayed to ensure the public can decide whether or not to purchase said item.
This would ultimately lead to real purchasing power for consumers, with a better understanding of the costs of transport, retailing and tax which contribute to the final price.
Of course, a consumer could always research these criteria, along with health issues and calories etc. but i believe the only way the public can freely decide purchases is if the information is right in front of them, similar to an energy efficiency rating system for electrical goods.