Consumers made $12.75 billion in online retail purchases during the five-day period from Thanksgiving Day to Cyber Monday, according to a study by Adobe. This represents a 14.7% increase from the same period last year. Black Friday registered the greatest growth in online sales, rising nearly a quarter (21.6%) above 2015’s level. And, a record 40% of online sales on Thanksgiving Day occurred on mobile devices, according to Adobe. Of the $771 million spent via mobile, 67.5% occurred through smartphones and 32.5% on tablets.