Price disparity

I purchased stuffed chicken thighs from Waterfront Spar in Humerail at R131. 99/kg. The following day I bought the exact same product from Our Spar in Walmer at R95. 99/kg. I have a photo of the two products and labels. Within less than 24 hours, how is it possible for such a difference in price? Or may Spar branches create their own pricing levels?