Book Inventory Management App/Software

I am looking for someone to design a simple software (or an Android app that is linked to a database accessible by PC) that helps me to organise my books into a database and source for information about the books via ISBN/barcode. *These fields should be updated with information retrieved from websites upon keying in ISBN (1) ISBN - i should be able to search and retrieve entries via this field (2) Name of book (3) Author (4) Edition (5) Year of publish (6) Price (new) (7) Price (used) - lowest price among all offers on Amazon (8) Overview of content - from Amazon/goodreads (9) Date of listing (10) Date of sale (11) Duration of posting - time difference between (8) and (9), or time difference (8) and system date, if (9) is not keyed in. (12) Source: drop-down box with "Others: [Pls key in]" option (13) Venue of sale (14) Genre (15) Top #100 books in: (information can be found under Amazon Best Sellers Rank on Amazon page) (16) Hyperlink to Amazon page (17) weight - converted to gram (18) shipping fees - calculated based on a fee chart, will be given (19) conditions: a list of tick box for me to tick, details will be given (20) sale platform (21) sale price *There should be buttons to (1) navigate between entries (2) create new entry (3) save changes (4) delete entry (with options for reasons - Sold/Trade/Donated/Others: [Pls key in]) (5) search and retrieve entry via ISBN *I should be able to manually update these fields in case the information retrieved is incorrect. *Interface should be simple and modern. Any other feature that makes the interface more userfriendly or facilitate searching is welcomed. *The database should be linked to an Excel file, or should be able to be exported as an Excel file. *I need a report page that shows me sale statistics (1) Books sold (2) Books purchased (3) Cost (4) Revenue (5) Profit (6) Cost per book = (cost of unsold books) / (number of unsold books) More information upon accepting project. Payment by Paypal, in 3 milestones: * 30% upon creating forms for input and retrieval of entries and the Excel database * 50% upon creating a system to retrieve information from websites after keying in ISBN * 20% upon optimising user interface for best user experience after I try out the software Pls PM me with the following info: - Your quote - Proposal: how you are going to create the software and how long it will take