You have been assigned as the editor of the student council president's letter about the end-of-year trip. Which sentence contains an error in comma
or semicolon usage?

Tech High School can donate $150 toward each student; this drops the price for individuals to about $400.

We need to finalize the number attending so we can make reservations, get volunteers, and make our final preparations.

Many factors cannot be predicted exactly, such as the number of students going, and the total airfare.