Except as the administrator may otherwise prescribe by rule, the "cash price" of goods, services, or an interest in land means the price at which goods, services, or interest in land are offered for sale by the seller to cash buyers in the ordinary course of business, and may include:
The cash price stated by the seller to the buyer pursuant to the provisions on disclosure (Part 3) of this chapter is presumed to be the cash price.
S.C. Code § 37-2-110