Answer:
$46.50
Explanation:
Now to do this, you need to first determine how much she spent on the first day.
She had a total of $124 and she spent 3/8 of it. This means that there are only 5/8 of it left. What is 5/8 of $124? We do that by multiplying it by the fraction.

After the first day, she has $77.50 left. On the second day, she spent 2/5 of what she had left. So that means she would have only 3/5 of what she had left.

So she will have only $46.50 left at the beginning of the third day.