Package Sales Revenue

I was using Analytics to pull our subscription package revenue every week and all of a sudden, the numbers dropped drastically.  When I try pulling the numbers from reports, I get a totally different number from a canned report and another one from a custom report.  Looking for ticket price only, no facility fees included.  Needing advice on the most accurate way to pull this.  Perhaps my filters aren't configured in the best way in Analytics.  Thanks!