You can look at the consumer expenditure survey, no need to gues

https://www.bls.gov/cex/2015/combined/cucomp.pdf

For a family with school age kids, average income is 110,541.

And LZ overestimated many expenses, for example

Federal income tax is $13,096, not $14,000

average state tax is $3,905, not $6,000

average health insurance is $3,702, not $6,000 

average rent/mortgage is $1,277 per month, not $1,800 per month

Total difference in above items is $22,234