The Parent Teacher Organization has raised $1800 to help pay for a year-end trip to an amusement park. They ask that there be one adult for every five students attending. Adult tickets cost $45 and student tickets cost $30. If the group wants to take 50 students, how much will each student need to pay so that adults agreeing to chaperone pay nothing?
a.$5
b.$40
c.$150
d.$3