The situation that illustrates two quantities that combine to make 0 is:
Sariah earns $10.00 for her allowance and then spends $10.00 at the movies.
In this case, Sariah's earnings and spending can be thought of as two quantities that balance each other out: +$10.00 (earned) and -$10.00 (spent), which together result in a net balance of $0.
The other situations involve discrepancies (expenses exceeding profits, or losing more points than gained, or having lost and found socks) but do not combine to exactly equal zero.