In budgets I could have the option to put if the number is + or -

In budgets I could have the option to put if the number is + or -, because I made a budget of how much I need to have in and every time I get a money it adds to the value of the budget. Example: if I created a budget of 1000 salary and I put that 1000 salary entered, in the budget the total will be 2000.