NRI sale of shares

If NRI sells 30 shares acquired through inheritance in 2006 and 10 shares were originally purchased by deceased resident parent prior to November 1981 whose original purchase price is unknown and the rest 20 shares were bonus shares given to the diseased parent, how can the Long Term Capital Gain (LTCG) Schedule 112A columns be filled? Full Sale Consideration is less than Rs. 1 lakh, hence LTCG will also be less than 1 lakh.