(2)
A substance classified in Schedule I which is marijuana, tetrahydrocannabinols, or chemical derivatives of tetrahydrocannabinols, or synthetic cannabinoids for an amount of:
(a) An aggregate weight of less than two and one half pounds, shall be imprisoned, with or without hard labor, for not less than one year nor more than ten years, and pay a fine of not more than fifty thousand dollars.
(b) An aggregate weight of two and one half pounds or more, shall be imprisoned at hard labor for not less than one year nor more than twenty years and pay a fine of not more than fifty thousand dollars.