Calc class question

[Dennis9]

A state park charges $13 per day or fraction of a day to rent a tent site, plus a fixed $6 park maintenance fee. Let T(x) represent the cost to stay in a tent site for x days. Find T (4 1/2).

I am so stuck. I keep getting different answers within the range of $52 - $71. I got these by pluging this in to examples we have done in class and what the book shows.
Thanks,

Dennis

 

[Unco]

A state park charges $13 per day or fraction of a day to rent a tent site, plus a fixed $6 park maintenance fee. Let T(x) represent the cost to stay in a tent site for x days. Find T (4 1/2).

Ignoring the fixed cost for a moment, how much does it cost to stay for x days, remembering it costs $13 per day?

Now add on the fixed cost and T(x) = ?