Ya I thought the numbers were absurdly low and that doc contradicted itself by saying 3,500 at first but later "... mud and you had these extensive snow conditions which meant that really a vehicle needed wide tracks to be able to negotiate conditions like that Garian had started barbarasa with 600 tanks by the middle of November he was left with just 50 that were operational by the end of October Army groups."

.... I guess this guy Garian had that many under his command.