HI YALL =] !

$${\mathtt{124\,566\,415}}{\mathtt{\,-\,}}{\mathtt{50\,000\,000}}{\mathtt{\,-\,}}{\mathtt{15\,000\,000}}{\mathtt{\,\small\textbf+\,}}{\mathtt{1}} = {\mathtt{59\,566\,416}}$$

=         74 566 415    - 15 000 000  + 1

=        59 566 415  +  1   =   59 566 416

Now this is a job for me

124,566,415-50,000,000=74,566,415-15,000,000=59,566,415+1=59,566,416

Overall, the correct answer is:

59,566,416