such person shall be subject to a penalty of $1,000.00 or $10.00 per gallon of dyed fuel oil involved in such sale, delivery, or consumption, whichever amount is greater, and such amount shall be multiplied by the number of prior penalties imposed on such violator under this subsection, and the resulting product shall be the penalty to be imposed.
Upon a showing of no highway use and reasonable cause, at the commissioner's discretion the penalty under this subsection may be reduced to 10 percent of the amount which ordinarily would have been due or payment of the tax may be accepted in lieu of such penalty.
OCGA § 48-9-16