What does this symbol represent and how do I put it in a financial calculator?

- $2,660. Future value using Simple interest is $2,660. Future Value using Compound Interest-$2,000 x (1 + 11%) ^ 3 $2,000 x 1.3676 S2,735.26. Future Value using Compound Interest is $2,735.26 Difference $2,735.26-S2,660 - $75.26. Difference between future value using Compound interest and simpl Note: A future value calculated using Excel or financial calculator formula p value. here in this case A future value calculated using Excel or financ