0.6*(130.4-105.4)-0.4*100-(108.63-103.92)*0.9=
1. 130,4-105,4=25 2. 108,63-103,92=4,71 3. 0,6*25=15 4. 0,4*100=40 5. 4,71*0,9=4,239 6. 15-40=-25 7. -25-4,239=-29,239