Two companies 'S' and 'T' sold a total number of 3900 watches in the month of February, March, April, and May. The ratio of watches sold by company 'S' in February and March is 5 : 3. The total number of watches sold by company 'T' in all four months is 1700. The number of watches sold by company 'S' in April is 25% less than the number of watches sold by the same company in May. The total number of watches sold by companies 'S' and 'T' in February was 1200. The number of watches sold by company 'S' in March was 16.66% less than that by company 'T' in April. The total number of watches sold by company 'S' in February was 500. Watches sold by company 'T' in May is 340 more than that in March.