“Employment” does not include service performed by an individual if:
(a)
Such service is performed by an individual under the age of 18 in the delivery or distribution of newspapers, shopping news, or magazines, not including delivery or distribution to any point for subsequent delivery or distribution, unless such service is performed by an individual under the age of 18 whose principal occupation is regular full-time work and whose attendance at school is incidental to full-time employment.
(b)
Such service is performed by an individual in, and at the time of, the sale of newspapers or magazines to ultimate consumers, under an arrangement under which the newspapers or magazines are to be sold by him at a fixed price, his compensation being based on the retention of the excess of such price over the amount at which the newspapers or magazines are charged to him whether or not he is guaranteed a minimum amount of compensation for such service, or is entitled to be credited with the unsold newspapers or magazines turned back.