There is an ongoing outage on the primary CPAN mirror. It is possible to work around the issue by using MetaCPAN as a mirror.
Based on Business::CreditCard by Jon Orwant.
Module Install Instructions
To install Data::Quantity, copy and paste the appropriate command in to your terminal.
cpanm Data::Quantity
perl -MCPAN -e shell
install Data::Quantity
For more information on module installation, please visit the detailed CPAN module installation guide.