@Doogle23
That extra is the General Adjustment.  From my prior comment on other columns:
Source     GA%   Generation%  Ratio
====    ===  =======  ===
Nuclear   42%          60%             0.70
Hydro       6%           24%              0.25
S&W         11%            7%               1.54    

Proportionately more of the GA is due to solar & wind than is due to nuclear or hydro.  Adding more nuclear would reduce the amount of the GA.  Adding more solar and wind increases the GA portion of your bill.  Solar and wind are driving the increased costs for power in Ontario.  Nuclear refurbishment is expensive, but that is included in the GA for nuclear and it is still less expensive in GA charges than S & W.

Finally, the most expensive source is from gas, because these have to be kept on standby in case of no wind and no sun.  You have to build extra mostly unused gas generating capacity just in case because S & W are intermittent.  So you pay TWICE for S & W.