(1) Those taxes imposed by subsections (1) and (2) of KRS 138.660 shall be determined as follows: The total number of gallons of gasoline and special fuels used during the taxable period in the licensee's operations on the public highways in Kentucky shall be multiplied by the tax rate.
(2) The tax imposed by KRS 138.660(3) shall be determined as follows: the total number of miles driven during the taxable period in the licensee's operations on public highways in this state shall be multiplied by the combined licensed weight tax rate.