[GUI Plugin] Action Chains

[chaley]

Originally Posted by ownedbycats

I'd like to make a chain that does arithmetic on a floating-point column and then adds the results from all selected books together. How would I go about this?

program: format_number($$#purchasecost - format_number($$#purchasecost/1.15, '.2f'), '.2f')

For context, was just curious how much of the value of my library is in sales tax.

You can use this sample chain as an example.

The attached chain is another example that uses a different technique.