… for distributing at least 115.5 grams of heroin, which is over 1,150 potentially lethal, 0.1-gram “doses” of the drug, … for distributing at least 461.9 grams of heroin, which is over 4,600 potentially lethal, 0.1-gram “doses” of the drug. … distributing at least 2.835 kilograms of heroin, which is over 28,000 potentially lethal, 0.1-gram “doses” of the …