Cost Calculator purchase code
Please note that our premium plugin, Cost Calculator, comes bundled with the theme and therefor doesn't have separate purchase code.
Although newer versions of the plugin have product license panel for entering purchase code, this will only work when it's purchased separately, not when it comes bundled with the theme.
Note that you are not required to purchase the plugin separately if you are using one of our themes, and you shouldn't enter theme's purchase code.
The only purpose of the product license is to allow people to update plugin through wp-admin panel, but since you got it together with the theme you will get the necessary updates with new theme versions.
You can find more information on bundled plugins on the following link.