How should the business analyst add a SalesAmount field into the Orders table?

Refer to the exhibit.

A business analyst must analyze sales using an existing sales order app.

– The Orders table in the app was added from a QVD file using the data manager

– The Orders table in the app and the QVD do NOT contain a SalesAmount field

– SalesAmount can be calculated by multiplying the Quantity and UnitPrice

How should the business analyst add a SalesAmount field into the Orders table?
A . In the data manager, create a new calculated field, SalesAmount, and set the expression value to Sum (UnitPrice * Quantity)
B . In the data mode viewer, add a calculated field named SalesAmount with the expression UnitPrice * Quantity
C . In the data manager, add a calculated field named SalesAmount with the expression UnitPrice * Quantity
D . In the Orders QVD file, add an additional field named SalesAmount with the expression UnitPrice * Quantity

Answer: A