The Soda industry is a perfect example of a Monopolistic Competition. This is because this is an industry that has differentiation in their products. Take Pepsi and Coke for instance they are similar but are distinguished as 2 different goods in the market. Also to go into the soda industry has very few barriers.
The ACS 1-year data shows the median family income for Springfield was $74,517 in 2015. Compared to the median Illinois family income, Springfield median family income is $633 higher. As with the median household income data, 2016 family income data for Springfield will be released in September of 2017.
Because they have a defined benefit pension package, they actually make significantly more. The average pension per year for an Illinois teacher is $43,164. Most Illinois teachers work for 12 years. That 43k is a 2010 figure. Every year after, there is a 3% cost of living raise, compounded annually, included in the defined benefit.