Tuition for one year at the state university Nick would like to attend is about $18,000. Nick plans to save money each month for the next 4 years to help pay for his first year. If his parents plan to contribute $12,000 toward his first year, what is the minimum about Nick must save each month to have enough money to pay for his first year of tuition? A) $50 B) $75 C) $125 D) $250