For the purpose of any sale, offer to sell, delivery or consignment of motor fuel in a quantity of five thousand gallons or more, the volume of the motor fuel for the purposes of calculating the price of the motor fuel is considered to be the volume that the quantity of the motor fuel would equal at the time of loading for sale, delivery or consignment if the temperature of the motor fuel was sixty degrees Fahrenheit. Any correction or adjustment required by this section shall be calculated on the basis of American society for testing and materials D1250-80, table 6B.