Function slg 

pub fn slg(
    total_bases: Result<CountingStat, OmittedStatError>,
    at_bats: Result<CountingStat, OmittedStatError>,
) -> ThreeDecimalPlaceRateStat

SLG - Slugging

Describes the amount of bases averaged per each at bat.

Hitters: Higher is better. Pitchers: Lower is better.