Explanation:
To find Nina's profit, we need to first determine how much money she made from selling the brownies and cookies.
The 25 brownies sold for a total of 25 x $1.25 = $31.25.
The 30 cookies sold for a total of 30 x $0.60 = $18.
Therefore, the total amount of money made from selling treats is $31.25 + $18 = $49.25.
Next, we need to subtract the cost of ingredients, which was $10.
$49.25 - $10 = $39.25
So Nina's profit is $39.25.