得とくする

suru verb (special), intransitive verb

profit; gain; come out ahead

Intransitive suru verb meaning to gain financially or materially, often in contrast to 損する (to lose out).

• 株かぶを売うって得とくした。

  I made a profit by selling the stocks.

• 早はやく買かっておけば得とくするよ。

  You'll come out ahead if you buy it early.