A. Any license tax imposed on peddlers or itinerant merchants or on peddlers at wholesale shall not apply to:
1. A licensed wholesale dealer who sells and, at the time of such sale, delivers merchandise to retail merchants;
2. A distributor or vendor of motor fuels and petroleum products;
3. A distributor or vendor of seafood who catches seafood and sells only the seafood caught by him;
4. A farmer or producer of agricultural products who sells only the farm or agricultural products produced or grown by him;
5. A farmers' cooperative association;
6. A manufacturer who is subject to Virginia tax on intangible personal property who peddles at wholesale, only the goods, wares or merchandise manufactured by him at a plant, whose intangible personal property is taxed by this Commonwealth.