"KW: Mark, can you give us a sense of the timing and cost for this? Like, the audits that you're talking about. Is there any sense of how quickly you could do it and what kind of cost it would be to the company?

I think it depends on what we find. But we're going to be investigating and reviewing tens of thousands of apps from before 2014, and assuming that there's some suspicious activity we're probably going to be doing a number of formal audits, so I think this is going to be pretty expensive. You know, the conversations we have been having internally on this is, "Are there enough people who are trained auditors in the world to do the number of audits that we're going to need quickly?" But I think this is going to cost many millions of dollars and take a number of months and hopefully not longer than that in order to get this fully complete."

Source: https://www.recode.net/2018/3/22/17150814/transcript-intervi...