my $in_prefix  = "K";
my $out_prefix = "K";

if ( $in_traffic > 1024 ) {
	$in_traffic = sprintf( "%.2f", $in_traffic / 1024 );
	$in_prefix = "M";
}
if ( $out_traffic > 1024 ) {
	$out_traffic = sprintf( "%.2f", $out_traffic / 1024 );
	$out_prefix = "M";
}
if ( $in_traffic > 1024 * 1024 ) {
	$in_traffic = sprintf( "%.2f", $in_traffic / 1024 * 1024 );
	$in_prefix = "G";
}
if ( $out_traffic > 1024 * 1024 ) {
	$out_traffic = sprintf( "%.2f",$out_traffic / 1024 * 1024 );
	$out_prefix = "G";
}