The ratio of the amount of money Jason had to the amount of money Wilson had was 12:13, then Jason had $12x and Wilson had $13x.
Wilson spent $63, then in the end he had $(13x-63). Since in the end Jason had 3 times as much money as Wilson, then

Solve it:

In the beginning Jason had $12·7=$84 and Wilson had $13·7=$91. In the end Jason had $84 and Wilson had $91-$63=$28.
Answer: Jason had $84, in the end altogether they had $84+$28=$112.