Leach Distributors packages and distributes industrial supplies. A standard shipment can be packaged in a class A$$ container, a class K$$ container, or a class T container. A single class A container yields a profit of $$; a class K$$ container, a profit of $$; and a class T$$ container, a profit of $.$ Each shipment prepared requires a certain amount of packing material and a certain amount of time.