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330 4x42+6x27 Second Case: 400c+150v+100s=650 250 662/3% 18*/„% In the fourth 1 qr 0 0 C 60+60=120 14+10*/, =24*/j 8 196 76 20+2x28 D 60+ 60=120 12+15 =27 14+17*/,=31Vt 16+20 =36 18+22‘/,=40»/, 7*/. 7V, 7‘/, 7 l/t.