2,345 is 7% of 33,500 There are many sites that can show you how to get a percentage so I am going to move onward. You will add the seven percent on each year, like the following
First Year: 33,500 Second Year: 35,845 (+7%=2,345) Third Year:38,354.15 (+7%=2509.15) Forth Year: 41,038.94 (+7%=2684.79) Fifth Year: 69,311.67 (+7%=2,872.75)