South Carolina Code of Regulations — Chapter 117 (Revenue)
S.C. Code Regs. 117-318.2 — Carrying and Finance Charges
When the seller has an established price for the goods he sells, that price is the amount to be
included in gross proceeds of sales even though the established price may include an amount to cover
a carrying charge. Where they seller has an established cash price and when selling on an extended
payment basis, adds a separate charge for financing, the additional charge is not to be included in
gross proceeds of sales.
In no event may finance or carrying charges be deducted from gross proceeds of sales when not
shown as a separate item in the seller's billing to his customer.
Source: official text