How do you populate $nfc_amt? Are you sure it's really 115 integer? 
my $n = 114.9999999999999;
print "$n\t", sprintf "%07d\n", $n;

__END__
Output:
115     0000114

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لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

In reply to Re: sprintf() returning incorrect value by choroba
in thread sprintf() returning incorrect value by ppeel

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