Pay sales tax with the Retail Sales Tax Return For Occasional Sales (DR 0100A) on the tangible personal property included in the purchase of the business by the 20th day of the month following the sale.
So, to avoid pregnancy she has to better avoid unprotected sexual intercourse in this period. The rest of the days i.e., starting from menstruation to the 10th day and again from 21st day up to menstruation are the safe days or the safe period to avoid pregnancy.
Living in Safe Area (well theoretically safe): 20k pm for an unfurnished 3BHK flat, or approx maybe 24k pm for a semi-fully furnished flat. Domestic Help: from 800 to 1.5k pm. Medical Care: 700 - 2k pm. Transportation: Depends! Bus and to and fro from bus stop to home/office is 2k pm, same for Delhi metro 3k pm.