S.C. Code Ann. § 59-150-200: Lottery retailer rental payments.

If a lottery retailer's rental payments for the business premises are contractually computed, in whole or in part, on the basis of a percentage of retail sales and the computation of retail sales is not defined explicitly to include sales of lottery game tickets or shares in a state operated or state managed lottery, only the compensation received by the lottery retailer from the commission may be considered the amount of the lottery retail sale for purposes of computing the rental payment.