Hints in the first two lines of the OP's sample code imply that leveraging Excel may not be appropriate:

#!/usr/bin/perl -wT
use CGI::Carp qw/fatalsToBrowser warningsToBrowser/;

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True laziness is hard work

In reply to Re^2: Interpolating data slope for multiple points by GrandFather
in thread Interpolating data slope for multiple points by oko1

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