Your fantasy lineup’s score is the average rating of the players you fielded, multiplied by 10, plus the points for events such as goals and assists and the department bonuses, minus 0.5 points for each fielded player left without a rating. These are the default values: each team can change them.
You’ll find it in the details of the finished match, under “FANTASY LINEUP SCORE”. The standings are in the “Stats” tab, under “STANDINGS”: they add up your scores for the season.