Odpowiedź:
1. PN = U – Z
PN = 375 160 – 376 467 = -1 307
2. WPN = (PN : L) · 1 000
WPN = ( -1 307 : 38 495 700) • 1 000 = -0,03‰
3. SM = I – E
SM = 12 330 – 28 100 = -15 770
4. PR + PN + SM
PR = - 1307 + (-15 770) = -17 077
5. WPR = (PR :L) • 1000
WPR = (-17 077) : 38 495 700) • 1000 = -0,44‰