A salesman earns commission on units sold. The more units he sells, the more commission he earns on a particular unit. For the first unit, he earns $20. For each subsequent unit, he earns 2% more. How much does the sales man earn on the 25th unit?

The problem ask to calculate how much does the sales man earn on the 25th unit were as the salesman earns $20 in the first unit. So base on the problem and in my further calculation, I came up with answer of $32.17. I hope you are satisfied with my answer and feel free to ask for more