How to add calculated column in table visualization based on row data on table visualization

I searched on the Internet, 

The solution is to create a new table using the Summary function, 

to summarize and group the project phases, or any specific column or columns, 

parent grouping, and parent-child groups in SSRS, 

then add columns with a sum function to calculate the sum of values for each group, 

then add a calculated column to apply functions on each row, 

The result is as follows