TWO MORE WEBSITES & A FORMULA

My another website:   https://sites.google.com/site/frommypenhsingh/home

The website of my friend Rabindranath Samanta:

                                                                                                      https://sites.google.com/site/myliteraryworkrabinsamanta/home

INTEREST =  M x (M + 1) x R

                               288

Where M stands for Months and R for Rate of Interest.