Is there a minimum price for use with addItem (e.g. _gaq.push(['_addItem', ...]);) and friends?
I’ve checked the documentation, but I can’t find any info either way on whether I have to give a minimum price (like '0.01', if I can call free items free '0.00', or even if you can make prices negative '-1.50').
We have some code that uses '0.01' for items that should really be called '0.00', so I’d like to correct this if possible, but I’d like to make sure it’s supported.
Yes, this will work just fine.
(Not only will it work, but if you mistakenly pass a non-numeric string, like, “thisisnotanumber”, the default behavior is for Google Analytics to interpret it as $0.00. So, it’s actually the standard fallback behavior when it can’t parse the number out.)