The difference in income between Cameron and Mateo is $500,000.
Explanation:
Cameron decided to start his career directly out of the high school with no further training. He was able to make an average of $30,000 in his career.
Mateo was a best friend of Cameron. He started his career after completing his college degree. He was able to make an average $55,000 for a year.
Both of them had huge difference in their salary. After 20 years, the difference between the income of Cameron and Mateo will be $500,000.
Difference in income after 20 years= (55000-30000)*20
= (25000)*20
= 500,000
Therefore, the difference in income between Cameron and Mateo is $500,000.