//input.txt

1.57163 ,17:29:57 Simple Dealin 
1.57163 ,17:29:57 
1.57163 ,17:29:57 
1.57163 ,17:29:57 
1.57163 ,17:29:57 
1.57163 ,17:29:57 
1.57163 ,17:29:57 
1.571 ,17: 
1.57172 ,17:30:08 
1.57176 ,17:30:10 


##</code><code>##


while (<DATAFILE>) {
  	unless (m{^(.*?)\s*,([\d:]+)}) 
	{
       next;
    }
    
	chomp $_;
         
    ($quote,$time) = split(",", $_);
    // do my computations
    chop($quote);chop($quote);