Please HELP me with JavaScript functions on this code. It's a digital vehicle logsheet. 1st 2 comments are my instructions

Question

Login Page https://code.sololearn.com/W3Tu0q5z5jag/?ref=app

Platform https://code.sololearn.com/WrwcTn1XrNYf/?ref=app

Answer 1

Login Page

- Please make my h1 and h6 align centre and to fit for mobile view-Android/Apple devices) on login.

- To login to driver's profile on the site using vehicle registration number and password.
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Page 1 (Logsheet)

- Travelled distance calculation.Everytime a driver enters "End km" to add to "Start km/distance" e.g Odometer 5000km + 500= 5500km. while leaving 500 km on traveled distance per trip

- To Automatically Open new page for a new trip after saving a current trip,be able to navigate back to edit it as well.

- To Save Changes under the driver's profile on the Firebase or cloud in a spreadsheet format .

Answer 2

- To calculate travelled distance per month in km's
i.e To calculate all travelled daily trips into one number at the end.
e.g day 1=5 km
day 2= 5km
Total km per months = 10km

- To calculate the amount of fuel poured in a month. ( amounts to be entered by driver when refueling )
e.g day1 = R500,00 30 litres
day 2= R500,00 30 litres
total = R1000,00 60 Litres

- For admin(me) & driver to be able to print all the populated excel pages on a A4 paper Landscape mode.

- For Admin (Me) to login to driver's profile and check,print and make changes.

NB: I don't want the app to be downloaded but shared via e-mail or Bluetooth as it's for internal use only.

Answer 3

https://code.sololearn.com/WY2Mk97HkNh3/?ref=app