The cost of attending a state university is $21,300 for the first year. Tom's grandparents have agreed to pay half of this cost. Additionally, John has been awarded a one-year academic scholarship for maintaining a 4.0 gpa for his entire 4 years of high school. The scholarship is $6,000. Which amount is closest to the minimum that Tom will need to save every month in order to pay the remaining cost of his first year at the end of 12 months?