Question

total money= 60 .spend= 30,amount= 30, spend= 15, amount= 15,spend=9, amount= 6, spend=6, amount= 0. how total spend and total amount is not equal?

Answer 1

Total amount is the initial amount only i.e. 60
spend= 30+15+9+6=60

The interim amounts you are showing are nothing but part of orig amount
Hope this will clear the puzzle.