Answer:
Given is : Maureen has a net spendable income of $2,100 per month.
Now, she sets up a 15 to 20% budget for transportation.
This means her should budget lie between
to
but she assigned $350 for this category.
Now adding up the sub- categories, we get:

So, we can clearly see that the sub-categories cost more than the category itself.
Maureen has budgeted her transportation wrongly. Either she should increase the budget or she should cut out few dollars from the sub categories.