SSRS , I am trying to make a table where the first row agregate and remaining row

Question

SSRS , I am trying to make a table where the first row will be a aggregate value and remaining rows should be displayed as such from the \DB For Example :

          A    B        
          100  1
          101  2
          102  2
          103  3
          105  1
          99   1
          98   1
          96   2
          95   3

Basically I should create a table in SSRS , where in SSRS table should display

    100-105  9
     99      1
     98      1
     96      2
     95      3

Any experts help me achieve this , Also using Stored Proc in SQL server Database what condition/ format should be used in SSRS 2017