ess Trust of India / Kolkata/Mumbai July 21, 2006Power utility firm CESC is planning to invest Rs 20,000 crore over seven years.The company today reported a 34% increase in net profit at Rs 55 crore when compared with Rs 41 crore in Q1FY06.According to a release issued by the company to the BSE today, total income increased to Rs 695 crore from Rs 688 crore in Q1FY06.