About three-quarters of the products we checked on Instacart were offered at different prices to different customers—with price variations for the same products ranging from as little as 7 cents to $2.56 per item. Graphic: Consumer Reports, Getty Images This article is part of Consumer Reports’ Make the Price Right series, which launched with our investigation into pricing inaccuracies at Kroger stores. Testing, research, and analysis by Derek Kravitz, Angel Han, and Alan Smith of Consumer Repor...