I need small application on flutter

Required in the software

(1) If the item found in the donation or purchased is found in the donation, then the person will be entered. If purchased, the information of the shopkeeper will be added and who bought it will also be added

(2) What is the stock of the item?

(3) Entry of the bearer (name, mobile number, building address, through whom the goods have been taken)
A reminder is to be placed in it to remind you after one month

Note: The software should work simultaneously in seven mobiles

This is a small job. If I like the work, another project is ready

The budget is 1000-3000

Thank you