Getting the file name



The script below produces a result, but I dont know what file applies
to what result.
Thought the file name would be $i, but printing that gives me the grep
result line in total

How can I print the file name?

TIA

Owen


------------------------------------------------------------------------------------
#!/bin/bash
USER=$1
for i in /var/www/*.csv

do
cat $i|grep $USER|awk -F "," '{sum+=$4}END {print " Usage = "sum/60}'
done
------------------------------------------------------------------------------------

.