how much should he be saving and saved by the time he retires with a similar lifestyle? Show by using Decision support system(excel)

40 years old men

yearly income of 120000

will retire at 65

current savings for retirement is 100000

work add 11000 per year to his fund for retiring in addition to his 8000 contributions per year

don't worry about tax or other fee

Inflation rate	3.8%
% Replacement	80%
Draw Down Rate	4%
Saving Premium	5%