From the original study:

Notes: Costs are calculated for vehicles driving 12,000 purposeful miles per year. Uses energy prices, gas taxes, and EV registration fees in the Midwest or State of Michigan. Representative models within segments were selected on the basis of sales volume and to include a variety of manufacturers. Entry, mid, and luxury segments are defined based on typical purchase price. ...

As in the first edition, AEG calculated all four categories of costs involved in fueling both EVs and ICE vehicles across benchmark use cases that reflect real-world driving conditions for U.S. households. The costs included:

• The cost of the underlying energy (gasoline or diesel fuel, or electricity)
• State excise taxes charged on fuel and EVs for road maintenance
• The cost of operating a pump or charger
• The cost of driving to and from fueling stations (deadhead miles)

This seems like the Anderson Economic Group is playing with statistics to make gas cars seem more attractive.

• the cost of energy in Michigan is above the national average.
• EV registration costs in Michigan are among the highest in the country
• 80% of EV owners will charge their cars at home, making including costs driving to and from public outlets and the higher rate charged there yield (intentionally?) misleading results.
• There is a marked loss of performance and an increase of energy-per-mile when using EVs in cold climates, like the kind Michigan has

If you look at this map of savings with EVs vs. gas cars, you'll find that most states have much larger savings with electric vehicles over gas vehicles, and there's still savings when driving in Michigan by their accounting!

Michigan is the most expensive state to run an electric vehicle with an average annual cost of $5,076

TL;DR: Disregard this study.