$14.$ In an effort to reduce its inventory, Rapid Grower is offering Greens, a local nursery $($Problems $12$ and $13),$ two additional price breaks to consider. If the nursery orders a three$-$month supply, the cost per bag is $$16.$ If Greens orders a six$-$month supply, the cost per bag is $$14\mathrm{.}50.$ Should Greens change its order quantity calculated in Problem $13?$