Get Average of Array - Visual Basic 2003

[wartech]

Hey Everyone!
I am writing a simple program that calculates the average grades from user input.

I need help with the following:
1) I have been getting the average of an array by doing the following Sub calcAverage()
average = grades(1) + grades(2) + grades(3) + grades(4) + grades(5) / 5
End Sub

2)Is there a way to combine this with the function to add grades to the array and use the lower and upper bounds to determine what the denominator will be?
Here is the code for the array:
Sub sortarray()
Array.Sort(grades)
For i As Integer = 1 To 5
sortedArray(i) = (grades(i))
Next
End Sub

THANKS for looking this over!

[wartech]

sorry it seems like every time i write it out, i am able to figure it out. of course if there is an alternative way of doing this please let me know.This is what I came up with.

Sub sortarray()
Array.Sort(grades)
For i As Integer = 1 To 5
sortedArray(i) = (grades(i))
sum = sortedArray(i) + sum
count = count + 1
average = sum / count

Next
End Sub