What’s the answer to this question as I don’t know the answer

Answer:
$142,714
Step-by-step explanation:
The total amount he invests, $200 per month for 35 years, is:
35 years × 12 months/year × $200 = $84,000
After 35 years, his investment is worth $226,714.31.
The amount of interest is the difference between the amount the investment is worth and the amount he invested.
interest = $226,714.31 - $84,000
interest = $142,714,31
Answer: $142,714