Cummins India announced today that its net profit after tax (PAT) increased 18.63% at Rs 74.61 crore for the quarter ended December 31, 2007 when compared with Rs 62.89 crore in Q3FY07.According to a release to the Bombay Stock Exchange, the company's total income increased to Rs 617.11 crore for the quarter ended December 31, 2007 from Rs 502.95 crore for the quarter ended December 31, 2006