Talk to Bill, who is the caravan master of Broken Hills in 2241. He can be found in Broken Hills Downtown area, south west building. If you shovel brahmin dung for him five days in a row, you'll be paid a tidy sum of $500, 500 XP and get the Expert Excrement Expeditor perk, which increases your Speech by 5%. Your Broken Hills reputation will take a slight hit, though. Once you achieve the perk, however, Bill stops offering the opportunity to shovel dung.
