A bakery sells muffins. The bakery's profit is given by P (m) thousand dollars when the bakery makes m hundred muffins. The number of muffins made depends on the number of customers, and is given by m (c) hundred muffins, where c is the number of customers. What are the units of each of the following expressions? P (m (c)) [Select] dP [Select] dm dm [Select] dc dP [Select] dc