The Grouping Aggregate RDL report is designed with the Grouping and Total concept to organize and summarize the data using Tablix data region.
It breaks the information down into quarterly intervals, so that you can analyze the information according to the order year.
Totalfeature, the total sales amount for each quarter and year is calculated in Tablix data region.
Currencyformat to improve the readability of report.
More information about the Tablix data region can be found in this documentation section.