§ 5.04.050   One act constitutes doing business.
   For the purpose of this chapter, any persons shall be deemed to be engaging in business or engaging in nonprofit enterprise, and thus subject to the requirement of § 5.04.040, when undertaking 1 of the following acts:
   A.   Selling any goods or service;
   B.   Soliciting business or offering goods or services for sale or hire; and/or
   C.   Acquiring or using any vehicle or any premises in the city for business purposes.