Explanation:
Date field: Actual End
Since the goal measurement is based on the completed calls (finished), you should choose
"Actual End" as it reflects when the call activity was completed.
Rollup field: Actual (integer)
You are measuring actual completed outgoing calls, so the "Actual (integer)" option is appropriate.
Source Record Type Status: Completed
To focus on finished calls, the "Completed" status is the right choice since it reflects when a call has been finished.

In Dynamics 365, when setting up a unit group for products like batteries that will be sold in different quantities (boxes of 12 and cases of 24 boxes), you first need to create a base unit. The base unit serves as the fundamental measurement for the product, which in this case would likely be the individual battery.
Once the base unit is established, you can then create related units, such as:
Primary Unit: This could be the box (12 batteries) for regular sales.
Related Unit: This could be the case (24 boxes).
Setting up the base unit is essential as it defines the foundation for all related units in the unit group.

Define a forecast model
Define the entities that must be used to generate the forecast.
1. In the General step of the Forecast configuration page, define the fields that should be used for the forecast.
[Steps 2 to 6 omitted]
7. Select a Rollup to hierarchy relationship.
This step establishes a relationship between the rollup and hierarchy entities. Each forecast template starts with a default rollup to hierarchy relationship:

Choose different values to support your organization's specific requirements if needed.
Note: Select a template
The fastest way to create a forecast is to use a template. The template that you select defines how the forecast groups data.
On the Forecast configurations page, select one of the following templates:
Org chart forecast: Rollup columns and projections are based on your organization's reporting structure. This template uses the Manager field of the User entity for the hierarchy.
Product forecast: Rollup columns and projections are based on the product hierarchy.
*-> Territory forecast: Rollup columns and projections are based on the sales territory hierarchy.