I was curious so I looked...
Wikipedia[0] says the energy of a gallon of gas is 33.70 kWh and MPGe is:
(total miles driven) * (energy of one gallon of gasoline) / (total energy of all fuels consumed)
26328 * 33.7 / 6727 = 131.89 MPGe
[0] https://en.wikipedia.org/wiki/Miles_per_gallon_gasoline_equi...
[1] https://www.fueleconomy.gov/feg/PowerSearch.do?action=noform...
[2] https://i.imgur.com/AACiz7d.jpg