“wcml_converted_…” appearing on delivery note

Hi. We’ve just started get a strange fault where two lines of code are appearing at the bottom of delivery notes in the Product table. It looks something like this:

Scout Guard Security Case
wcml_converted_subtotal:24.95
wcml_converted_total:24.95

I’ve had a look at the code and the print-content.php template, and I can’t see anyway of isolating the additional “wcml_converted…” lines in order to remove or hide them (with CSS).