"Interest on investment collected by the bank" should this be written under add or less in the BRS? why?

Dear Student, your query seems to incomplete as you have not the mentioned the starting balance of the BRS. 
However, if the starting balance of the BRS is as per the favourable balance of Cash Book (Dr.) then Interest on Investment collected by the Bank is added. 

However, if you still find any difficulty then specify the point in which you have doubt so that we can help you in the best of our manner.