simple pos app by xamring

note: budget is determined , we want xamrin developer c#

project feature
-user can choose product from a category
-app get the product by http request
-login user (api will provided )
-create invoice and print with items selected
-connect with printer
– easy to use (UI we will help you)
-DB will be provided and the algoraithm also

just we need some one to build by xamrin the app to generate apk , and exe
about how to insert and get the information in DB , we will provide them to the developer