There are some possible interpretive variations in your fact-set that might need clarifying, such as number and timing of the investment-deposits. But you can easily adjust the following basic approach as need be.
I'll set it up assuming Jason will make one deposit per year, consisting of 5% of his salary of that given year, and it will be made at the end of such year. Further, he'll have a total of 30 such deposits, and we'll compute his accumulated amount immediately following the final one.
The set-up lays out as....
...where T is the total accumulated amount. Note that the FV of the first, second, and final deposit are shown explicitly, with the others implied.
Note that this is a Geometric Series, with initial amount a = ; common ratio r = ; and there are a total of n = 30 terms.
With that, use the sum-of-a-GS formula...
...to quickly obtain Jason's final accumulated total.