retreving from a file

heres my problem I appending to a text file four values for a report I want to retrive the value after five entries (one weeks worth) and add there totals to get an average for each thus giving me a report for a week
is it posible?
if so can anyone give some addvice on how

something like

Open "c:\file.txt" For Input As #1

line input #1, a
line input #1, b
line input #1, c
etc....
' then

text1.text = e+f+g+h+i

can you elaborate I've attached the file
I need place the totals on the bottom