(42071-970X40)X7000-48000:80+256740X600
3271х7000-600+154044000=22897000-600+154044000=176940400
1)970*40=38800 2)420771-38800=381971 3)381971*7000=2673797000 4)48000/80=600 5)256740*600=154044000 6)600+154044000=154044600 7)2673797000-154044600 =2519752400