Windows application to analyze csv file from paypal download history

I want simple windows application which will analyze csv file exported/downloaded from [login to view URL] download history. Specifically I want to get 2 information about my subscription product. Here is information I need to get for each subscription product. 1. I offer free trial subscriptions. I want to know what % of people who signed up stay after free trial for given period of time. By period I mean that your application should analyze data from csv file only between date1 to date 2. For example if I have paypal data downloaded from full year but I select period from January 1st to June 30 application should only use data between that. If I select "all data" than just analyze all data from file. 2. How long in average customer stay paid customer in given period Remember that I need above 2 data for each and every subscription product in csv file Note that some people buy without trial. Such people should not be in point 1 stat but should be included in point 2 stat. Additionally I need: 1. average total earning per customer from subscription products, non subscription product and total for all prodcut. This is simple just total/add all earnings and divide by number of UNIQUE customers. Since some customer buying multiple product and pay many subscription you must first calculate unique number of customer for subscription, non-subscription, and total. Remember that the same customer can have multiple subscription and multiple non subscription product. But to make average you must remove duplicates so the same customer will be counted only as 1 customer for purpose of this calculation 3. How many different product customer buys in average. Again I need for subscription, non-subscription and total. So: - how many different subscription products in average customer buys - how many different non subscription products in average customer buys - how many different products customer buys in total in average including both subscription and non subscription ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform ms-windows