p. 173 in CFAI FSA book: Net monetary liability in Temporal method example

Does anyone know how they got the 171 LC for yr. 2000 net monetary liability? I am totally stumped.

Net Monetary xposure for Temporal method in LC is = (Cash + AR) - (AR + STD + LTD) Go to page 170 to fill up the details from Exhibit-2 NME = (34 + 300) - (255 + 110 + 140) = -171

much appreciated