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 makeonedeposit 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....

...whereis the total accumulated amount. Note that the FV of the first, second, and final deposit are shown explicitly, with the others implied.T

Note that this is a Geometric Series, with initial amount= ; common ratioa= ; and there are a total ofr= 30 terms.n

With that, use the sum-of-a-GS formula...

...to quickly obtain Jason's final accumulated total.