Ashish can complete a piece of work in 12 days, Balraj in 15 days and Chintoo in 20 days. All of them together started the work, but Chintoo left when he realised that the remaining work will be completed without him in the next 2 days, and Balraj left when he realised that the remaining work will be completed without him in the next one day. Find the total number of days taken to complete the work.