If an IRA is a variable-rate investment for 25 years at rate r percent per year, compounded monthly, then the future value S that accumulates from an initial investment of $1000 is S = 1000 (1 + (0.01r)/12)^ 300 .
I think you want to know this ....????
S = 1000(1 +.01/12)^300 ≈ $1283.89
+8 
