Design for App Mobile Calculator for Party

User Story 1 Actor: User app for mobile Action: Calculate the amount of units per item selected and correlate with the amount of people and children. Functionality: In a single screen should be possible to select the number of people, number of children, choose a single type of item (cake, soda, beer, sweets, snacks, etc) and clicking "Calculate" should return the result of the equation. Sample A: 2 adults + 1 children for Soda = 2 lts Coca-Cola; Sample B: 35 adults + 5 children for Cake = 20 kg Cake; User Story 2 Actor: User app for mobile Action: Send the registration of all transactions by email or facebook or twitter. Functionality: In another window should be possible to send the record of all transaction made ??since opening the app and send it by email, facebook or twitter. Refer: [login to view URL]