The document calculates the time needed to recalibrate India's 2 lakh ATMs for the new currency notes based on the number of engineers that could be deployed. It estimates that with 8,000 engineers working 12 hours a day, 24,000 ATMs could be recalibrated daily. In 13 days since demonetization was announced, over 3 lakh ATMs could have been recalibrated. Even with fewer engineers, over 1.5 lakh ATMs could have been done. However, many ATMs still remain non-functional or run out of cash quickly. The author asks Mr. Jaitley to comment on these calculations.