Let's do an exercise:
Write down your annual income. Then multiply this amount by the number of years you have been working. It’s a pretty big number right? This is the total income that you have earned so far in your working career.
If you make $40,000 a year and you've been working for 8 years, your total income is $320,000.
If you make $100,000 a year and you've been working for 4 years, your total income is $400,000.