So far,
2565 Km total, 2073 were EV. Remaining 492 Km used 29.2 L of premium fuel (5.94 L / 100 km)
Lifetime average 1.14L / 100 Km (29.2 L used on 2565Km) + 299Kw.h (less than $0.10/Kw.h)
Total cost : $42 gas + $30 electricity = $72 for 2565 Km or $2.80 / 100 Km total fuel+hydro.
This last overall cost was 2.8¢ / Km for energy only (all other expenses excluded). YMMV
299Kw.h / 2073 Km means 14.43Kw.h / 100 km or $1.44 / 100 Km @ $0.10/Kw.h or 1.44¢ / km energy cost on the electric mode only ....
EDIT
NB: I did not measure myself the above 299Kw.h total energy consumption, it was reported on myvolt.ca but it should be close, my Volt average between 4.5 to 5.2Kw.h (outside temp 15C to 25C) per 36Km way to my work every morning, so the 14.4Kw.h / 100 Km make sense to me because charging at 120Vac is not 100% efficient.