Need help with a recursive investment problem. I have X dollars to invest.

1. I just save it with no interest so current year savings = last year savings. 2. I save it in a CD with 2 years increments only with interest being the same but there is recursion here. If I start with $1000, I get $1210 at the end of the 2 years. 3. I buy a bond with an initial $250 fee and 3 year increments only. Bond also has an interest rate like the CD.

What is the final recursion equation?