Only daughter share in a property of deceased muslim father

If wife of Mr A is alive then her share will be 1/8 (10000 share ÷1/8=1250and rest share 8750will divided amongst one son (3500)and 3 daughters(1750*3) and Son of Mr A didied who has no son but left one wife and one daughter hence that 3500 share will be divided amogst her dautwill be enjoyed half share and wife will get 1/8 and rest sahares will be distributed to his 3 sisters according to Islamic law cum Faraz. 

The property belongs to A  , so upon his death the property will be divided in his three daughters and one son ; the son will get half of what daughetrs get. That is the proeprty is divided in two and quater shares , one share will go to son and the three quaters to three daughters.

The son died so his property will devolve on his wife and saughter ,  wife will get quater and daughter will get half another quater will go the sisters of deceseased.

Thank you my Respected Experts for doubt clear.