In this sample, Total Units acts as the calculated field. Users can insert a new basic arithmetic expression based on the existing measure items either through a dialog at runtime or through code behind.
The calculated field feature allows users to create custom fields which are not present in the actual data. Users can
create these fields using basic mathematical expression collaborating with existing fields. Calculated fields can
be created through UI dialog as well as code behind and it can be enabled by setting
allowCalculatedField as true. The
calculatedFieldSettings property is available to configure the calculated field in code behind.