Given the following, what is disposable income?

Items and their annual amount or value

$\backslash$table$[[$Item$,$Annual Amount or Value$],[$Utility costs,$$2,760],[$Employment income,$$75,000],[$Housing related costs,$$22,400],[$Total investments,$$55,000],[$Total expenses,$$50,000],[$Deductions at source,$$22,500],[$Net cash flow,$$2,500]]$

Select one:

a$.$ $$67,500$

b$.$ $$72,500$

c$.$ $$52,500$

d$.$ $$25,000$