Question

I have Rs 50/-
Spend Balance
20/- 30/-
15/- 15/-
9/- 6/-
6/- 0/-
….… ………
50/- 51/-

Answer 1

Adding balaces is not right at all
for eg if i have 1000
spent         balance
100                900
100                  800
 100                700
100                    600
100                     500
500                     0
Acc to this i'l have 3500 which makes no sense