For the purpose of providing a fund to defray the expenses of the examinations and analyses prescribed in this chapter, other than Article 11, each person selling or offering or ordering for sale or distribution in, or for export from this State, any seed mentioned in this chapter, other than Article 11, shall register his name with the Department of Agriculture and shall pay a license fee annually on January first of each year. The department shall charge for these licenses a minimum fee of twenty-five dollars and a maximum fee of one hundred fifty dollars. The department shall institute a graduated fee schedule between these minimum and maximum fees, which must be based on the per year dollar volume of the gross business receipts of the applicant. The department shall retain any revenue collected pursuant to this section to defray the costs of printing, mailing, and inspections and to pay the costs of leasing the Florence Farmer's Market from Clemson University. The commissioner's receipt for such license tax is a license to conduct the business.