In order to see the price of a formula or of a mix, you first need to enable the pricing module in the shop and enter the Selling Price for each marketing item.
You can enable the pricing module as a user with the Shop Owner role by going to Settings >> Config, turning on the setting "Enable pricing module" and clicking SAVE.
When the pricing module is enabled, then the tab "Inventory" will appear in the Settings menu.
The Inventory page contains all the paint components (like toners, primers, clearcoats, hardeners, activators, and so on) which are available in your country. Use this page to indicate which marketing items you have in stock and to enter the price for each marketing item.