Luigi and his family are discussing how to pay for his college education. The cost of tuition at the college that Luigi wants to attend is
$12,000 per year. Luigi's parents will pay 50% of the tuition cost every
year, and Luigi's will pay the rest. Luigi has four years to save enough
money to attend his first three years of college. What is the minimum
amount of money he should save every month in order to reach his goal?