Wis. Admin. Code § ATCP 105.22
When calculating “cost to retailer” under s. 100.30 (2) (am) 1m., Stats., if an average posted terminal price for the specific grade of motor vehicle fuel sold by a retailer or retail station is unavailable from the terminal located closest to the seller, the seller shall use one of the following:
History: Cr., Register, May, 1999, No. 521, eff. 6-1-99.