Soft drink distributor Buffalo Rock Co. has generated impressive incremental sales as the result of a beefed-up promotional platform around its sponsorship of October’s Food World Magic City Classic presented by Pepsi college football game in Birmingham, Ala. During a four-week promotion at 55 Food World supermarkets in Alabama, sales of two-liter bottles of Pepsi products nearly doubled over the same period a year earlier, said Fitzgerald Washington, Buffalo Rock’s general sales man...