Need help with Macro 2007

Hello,

College_Cost()
Dim Tuition As Currency
Dim Room_and_Board As Currency
Dim Miscellaneous_Expenses As Currency
Tuition = InputBox("EnterTuition")
Room_and_Board = InputBox("Enter ...
Miscellaneous_Expenses = ...

Total_Cost=.... ( I'M NOT SURE HOW TO FINISH THIS COMMAND SO IT WILL ADD)
MsgBox ("Total Cost = $" & Grosspay & "")
End Sub


Hi, I need help finishing the command Total_Cost= so it will add the cost of all the dims.. Can someone give an idea how to fix it..??.

Thanks