Iis Log File

I would like to know if it's possible, from an IIS log file, to determine the exact size of a file downloaded from a web server.
For example, when using this link, URL to download the requested file, 3 entries are added to my IIS log file like the following ones:

ENTRY 1 :
193.169.50.50, -, 8/11/2003, 10:49:46, W3SVC1, RD, 193.169.50.51, 0, 622, 3822, 401, 5, GET, /tampon.pdf, -,
ENTRY 2:
193.169.50.50, usertest, 8/11/2003, 10:49:58, W3SVC1, RD, 193.169.50.51, 480, 354, 98304, 200, 64, GET, /tampon.pdf, -,
ENTRY 3:
193.169.50.50, usertest, 8/11/2003, 10:50:02, W3SVC1, RD, 193.169.50.51, 3785, 243, 229268, 206, 0, GET, /tampon.pdf, -,
1-) Does anybody know from those 3 ENTRIES what'is the exact size of the file, tampon.pdf ?

2-) Is there a way to force IIS to send the file to the web browser just at one shot ?

IIS is configured to use Microsoft IIS log file format
IIS 5 is running on a windows 2000 server


Thanks in advance

Syllas