u can ask them for the past FY, how much is their increment. i believe the $100 is the end of year increment. he has not added in those misc increments / salary adjustments during the year.

after 3 years can hit 4.7k? cant confirm, but i will say it won't be far off. if promoted within 2 yrs, will hit even faster. if not, then will take 3-4 yrs to hit that amount. a promotion increment will be about $300-$400.