The average cost of running a public school system includes salaries, utilities, and supplies.
运营公立教育系统的平均成本包括工资、公用事业费用和供应品。
To determine the average cost per student, we need to divide the total expenses by the number of students.
要确定每个学生的平均成本，我们需要将总费用除以学生人数。