Regarding capital gain AIS

Sir with due respect I want to information regarding capital gains that in Annual information statement my gross sales from security and unit of mutual fund show a sum of Rs 4263842/- and purchase shown sum of Rs 4454863/-,whereas information send by the broker is comes sell amount Rs 1386343/- and buy amount Rs 1328710- capital gains/Loss Rs 57633/- Sir I want to know that how to compute capital gains thanks.