Hi
@Chakku,
I have got the desired result as per your requirement.
added diagonal elements in below direction of Red, I have also done in reverse direction i.e from D2 onwards to A5
View attachment 1573125064908.png
1. Get excel to collection
2. Set the initial cell ref as "A2", as we want to start from there.
3. Make loop of collection and use GO to Next Cell action of MS Excel VBO in which Rows , columns should be 1.
4. Once output of above action gives you the cell ref then use Get cell value action to get value out of it.
5. in loop have calculation stage to add all cell values
Hope its helpful, Please let me know if you understand , I have also made the process and tested it with above cell reference attached.