hase000

王老板損失了 176 元。

hase000

qwertt12,
  Y! v! e- c' g, ~Your calculation should be wrong. As Mr. Wong need to refund $100 to his neighbour. The calculation should be :
. s5 q( ]6 j; [# T& }) C' I$100 (refund to neighbour from Mr Wong's own money) + $79 (paid to the young man) - $3 (earning from the sale) = $176
3 E3 E' H+ b( o$ @) qtvb now,tvbnow,bttvbThis should be the fact.

hase000

% l' l* ^- \/ k5 H$ f5 U
tvb now,tvbnow,bttvb( N( A0 |$ v6 b0 d4 B
Sorry, I think wrong. Actual loss should be $118 (refund to neighbour $100 + cost of gift $18) - $21 (sales income) = $97