Ms. DeVoto dreams of having a farm and needs to determine how much food she needs to feed the animals. Ms. DeVoto knows that she needs to order the same amount of cow food as chicken food. She needs four times as much pig food as cow food and needs half the amount of goat food as pig food. If Ms. DeVoto orders 600 packages of animal food, how much pig food does she buy? Let b represent the number of packages of cow food Ms. DeVoto purchased for the farm.