Bill generation in React Native

We are creating a Billing app for small shops & businesses.

Bill Example is shown in attached document.

We have created a Bill generation code but it isn't perfect & reliable. The previous bill generation images are attached

I want this features in the bill generation :-
1) on top Bill Date - The user can change bill date

2) Items - user can add items from the database.

note - we are using react-native-sqlite-storage for storage

3) No. of Items

4) Sub Total - Total amount of the bill

5) additional charges - displays a input to add charges (charges will be minus from bill total)

6) discount - displays a input to enter discount (discount will be minus from bill total)

7) there will be fro options in the page (shown in attached document)
1. Voice - No need to work on this
2. Barcode Scan - No need for this
3. Save - saves the bill in the database
4. Generate - on click able to share bill

Note - Bid if you are 100% confident to do this work