700*(80%)*(EBIT-120)=600*(EBIT-85)*(80%)
700EBIT-700*120=600EBIT-600*85
(700-600)EBIT=700*120-600*85
100EBIT=84000-51000
100EBIT=33000
∴EBIT=33000/100=330
700*(80%)*(EBIT-120)=600*(EBIT-85)*(80%)
700EBIT-700*120=600EBIT-600*85
(700-600)EBIT=700*120-600*85
100EBIT=84000-51000
100EBIT=33000
∴EBIT=33000/100=330