Answer:
He wishes for 200 pounds, and he receives it thorugh compensation for his sons death.
Step-by-step explanation:
In the monkeys paw, we see that it was wished by Mr. White that he had 200 pounds (thier currency). He receives the money becuase it was "compensation" for his sons previous death.
Later on in the story he goes on to wish for his son to be revived. When the wish comes true, his life soon became a nightmare, as he was afraid his son would be decomposed, and look fleshy and nasty. So, he wished for the last time that he would be dead once more. Concluding Mr. Whites' three wishes.