With the arrays, yes, it will make it much easier. Assuming you have your worksheet open (exercise left to the OP =): 
my $row = 0;

while (<DATA>) { # data loop is here
  # unpack, etc.
  $worksheet->write_row($row++, 0, \@fields);
}

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In reply to Re^5: Seperating Fixed Line Feed into Fields by Transient
in thread Seperating Fixed Line Feed into Fields by drodinthe559

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