Answer: The sales man earn $32,17 on the 25th unit.
Step-by-step explanation:
Hi, to solve this problem you have to multiply the amount of the commission ($20) by 1.02 (2% of 20) raised to the power of 24.
so, the answer to this problem is:
20 x (1,02^ 24) = 32,1687.... = 32,17
The salesman earns $32,17 on the 25th unit.
Feel free to ask for more if it´s necessary or if you din,t understand something.