(a) If the benefit offered, conferred, or agreed to be conferred, solicited, accepted or agreed to be accepted is less than $500,000, commercial bribery or commercial bribe receiving is a Class A misdemeanor and the sentence shall include, but not be limited to, a fine not to exceed $5,000.
     (b) If the benefit offered, conferred, or agreed to be conferred, solicited, accepted, or agreed to be accepted in violation of this Article is $500,000 or more, the offender is guilty of a Class 3 felony.