After installing the plugin, there will be three main navigation options in the working area: Calculator, Condition, Settings. The third one (Settings) gives you the opportunity to change default settings. In the free version of this plugin, you can change general settings and currency settings.
In General settings, you can set up a title for showing Total Description Header Title, Calculator Box Style, and Description Option as the default action of a calculator.
As an example, it is chosen Total Summary text for the Total Description Header Title, Vertical for the Calculator Box Style, and show action for the Description Option. The result is the following.
In Currency settings, you can choose settings prices and quantity due to your product such as currency symbol, currency position, thousands of separators and decimal separators, settings of the character appeared after the integer.
Below you check the example with the changes dollar sign ($) for currency symbol, Left with space for the currency position, comma (,) for the thousands of separators, full stop (.) for the decimal separators, and 2 for the number characters appeared after the integer.