The average aide salary at Richland High was $33,274 , which is 44 percent higher than the average salary for this job in Missouri, and 3 percent higher than the national average for this job . Aide salaries at Richland High typically range from $25,920 to $41,050 (25th to 75th percentile). The highest reported aide salary was $44,374. There are 9 employees at Richland High with the job title aide.