monthly investing index fund

$20,484 — Value of $100/month after 10 years at 10% average annual return $76,570 — Value of $100/month after 20 years at 10% average annual return $197,393 — Value of $100/month after 30 years — you only contributed $36,000 of this 10.5% — Historical average annual S&P 500 return over 30 years through 2024 $1…