calculation of nci investmest valuation

First, receive lots of thanks for lectures,notes etc.
second,a qn about the valuation of nci investment:
must you add the two figures together(parent n nci) when calculating goodwill or put the two separately on a column?
On the mini excercises on Goodwill caculations Qn 3b the nci valuation is indicated as 105,000.I got 52500 as the correct figure for nci
=0.7*0.25*600000*0.5
Or did i miss something????
Thanks n rgds
A