How DV maintenance is generally decided?

How much is interim maintenance awarded to Women in DV? 1) Highly qualified Wife ( Recently completed Msc Maths ) left job of monthly Rs. 20 thousand ( on herself resigned just before putting DV case ) 2) Children are with Father and not with mother in Chennai 3) Wife staying at Father in law flat forcibly displacing them out of their own flat- ( father in law is sole owner of flat in chennai) 4) Man has to take care of displaced unhealthy senior parents 5) Not even single rupee spend by wife toward childerns or husband ever 6) Bank balance of Rs. 3 lacs with wife during filing DV case 7) Husbands income is Rs. 90 thousand. month and have responsibility of EMI , Childrens Education and upbringing and old age parents medical condition 8) Monthly left over of Rs. 10 to Rs.15 thousand by husband What is probable amount that may be fixed by High court considering above facts as interim maintenance and for how much is probable period for this interim Maintenance will levied on husband?