He also greeted clients and collected their docket so the food parcel could be made up.
Mr McGruer said it was always a good feeling to help people out when they came in at their wits' end.
"It helps people who can't manage."
It was also an enjoyable social activity, he said.
"It's just friends and that. You meet other people."
Mr McGruer said his aim was to see as much food donated as possible. Chairman Alan Plunkett said volunteers were "essential" as the charity would not function without them.
To date almost $8500 has been raised through the appeal. The total included 1628 donated items valued at $2 each.