Here's a wild (untested) idea for the second script: 
my %quantities = map {
    (my $name = $_) =~ s/^quantity//; 
    $name => param($_); 
} grep { /^quantity/ } param();
;

[download]
I think there may be a better way to represent your data as HTML form widgets, but it's not coming to mind immediately.

In reply to Re: CGI problem: trying to assign parameters in a loop by chromatic
in thread CGI problem: trying to assign parameters in a loop by bighara

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