I need someone for solving a mongo db issue

HI! I need someone who knows mongo database for a really quick job It maybe takes 10 min maybe an hour but I don't think it would last more if you know what you are doing. I have a question answer site using mongo database, and my site has a top list where the daily number of the posted questions, answers should appear. The number of the posted question appears well, but the number of the posted answers is missing. This is what should be corrected. Thanks for the applying