Simplea Android APP

Small android app for collect warehouse in/out stock movement. 1) On the first screen operator can choose his name. After tapping the name, app will go to 2) 2) On second screen the operator can choose article ID+NAME (via scrolling list?). After tapping article, app will go to 3) 3) On third screen operator can choose quantity (via calculator like keyboard) and with 2 button, 1 for quantity entering (stock increment), 1 for quantity exit (stock decrease). After pressing one of two these buttons, app will go to 2) 4) Returning on screen 2, if there is at least 1 in/out recorded action, 1 more button will be visible as "go to checkout". Tapping this will to go to 5). 5) On fourth screen operator can review his just inserted in/out operations and confirm transaction Few notes: 6) number of operators (ID, Name) in page 1 will be 6-12 7) number of articles (ID,Description) in page 2 will be less of 100 8) one setup page must be created for configure operators, articles and manage data connection to remote DB server export. Two more requests are not essential, but will do difference: 9) all data transactions must to be recorded in a local DB and pushed up to remote DB server everytime it will be reachable via wifi (or scheduled every X minutes). 10) configuration data as operators name and articles, must be pulldown from remote server final request 11) source code must be provided, free to modify and without royalty. Please feel free to contact me for any other information