South Carolina Code of Regulations
Chapter 117 - DEPARTMENT OF REVENUE
Article 11 - SALES AND USE TAX REGULATIONS
Section 117-324 - Dual Business
Operators of businesses who are both making retail sales and withdrawing for use from the same stock of goods are to purchase at wholesale all of the goods so sold or used and report both retail sales and withdrawals for use under the sales tax law.
This ruling applies only to those who actually carry on a retail business having a substantial number of retail sales and does not apply to contractors, plumbers, repairmen, and others who make isolated or accommodation sales and who have not set themselves up as being engaged in selling. Where only isolated sales are made, tax should be paid on all of the taxable property purchased with no sales tax return being required of the seller making such isolated or "accommodation" sales.