Respuesta :

2,400-535.18-900-506-143.75-62-175=
let me solve this quickly
Add all the expenses together
   535.18
   900.00 
   506.00
   143.15
     62.00
+ 175.00
-------------
2,321.33

Now subtract that from what he earns.

    2,400.00
  - 2,321.33
----------------
         78.67