The average aide salary at Mexico Middle was $41,015 , which is 77 percent higher than the average salary for this job in Missouri, and 27 percent higher than the national average for this job . Aide salaries at Mexico Middle typically range from $34,300 to $48,875 (25th to 75th percentile). The highest reported aide salary was $67,385. There are 7 employees at Mexico Middle with the job title aide.