New Release app android just developed + source code

In summary: App android just developed that permit to check new orders from Database Mysql (Web site) with details via API (JSON) and print details orders via printer bluethoot. We need to update this version of app in order to store on a database Sqlite all the information of orders and permit to add a new function to sale the products (capture info via API) in order to store a little cart and print it. I remember that the printing management is just developed via bluetooth in order to print the details of orders. All the information must be stored on a database SqlLite and i will sent you all the details of tables to create in order to assist you to update the app in easy way because we are experts data manager ( design tables just developed + we provide new API to capture info for new functions). Finally, We need to develop a little service to wake up the device (for example any 5 minutes) from sleep mode in order to listen new orders. We have defined a budget of 200 USD : 50 USD to start, First Step 75USD (delivery : details orders stored + new function sales with info stored ) ,Second Step 75USD to sign off project (delivery : function print details sales and service to start the device from sleep mode and listen new orders); Please read major details in files attached. Time delivery : 7 days We require maximum reliability and professionalism