money_format - 负数

I got the following code

#   On va convertir en somme monétaire
#   We convert our integer into a way to read money
$Vars['Income']     = money_format('%.2n', $Income);
$Vars['Spending']   = money_format('%.2n', $Spending);

#   On va calculer ce qui reste à dépenser
#   We do the math to know how much we can spend until the end of the month
$Vars['Remaining']  = money_format('%.2n', $Income - $Spending);

If $Income - $Spending is negative (under 0), then the income is lower then the spending. Alright. I am using my locale, french (canada) and the result for a negative number is (X,XX $).

Not having a - sign make non sense for me so I want to be able to output the number with a -0.00$ and not with (0.00$).

Example my income is 75.00$ and my spending are 100.00$. I spent 25$ more then I do so the remaining money will output (25.00$) but I want -25.00$.

I did try to add ( or + but I don't understand.

Thanks

UPDATE: Picture

The format strings for money_format are a bit confusing. What you want is:

money_format('%+.2n', $Income - $Spending);