The Checkbox element contains the following attributes:
Label field - Title of the element
Description field - Description of the element
Currency Symbol Option - Enable if you want to disable the currency symbol
Round Value Option - Enable if you want not to round value to the whole number
Checkbox Options - Add options with their values by clicking the Add Checkbox Options button. You can add as many options as you need.
Let's see the filled checkbox element with its result.
The result in the calculator form:
The result in the Total Summary block: