How Much Should I Be Paid for Preparing a 3rd Grade Physics Worksheet?

[prasanavasan]

Hello, I am offered a work to prepare a 3rd grade Physics work sheet. And , I am offered a payment of $20 per grade. They have given me 5chapters and it would take a month to prepare.
What is the normal payment give to prepare a worksheet on Physics. How much should I be offered?

 

[SteamKing]

I didn't know they even had 3rd grade physics.

 

[prasanavasan]

They have given me more topic on Physics. It may be covered under science. I need to know how is the normal payment for preparing digital notes