Maths Proofreader for K-7 grades

Need someone with exceptional mathematical skills and a great eye for details.
The task will be to
1) proofread large volume of mathematics worksheets from K-8 classes. You need to make sure that there is no mathematics error in the worksheet.
2) Align the worksheets to school books. Make sure that all portions of the school books are covered. If there are any missing questions, you need to provide them. For example, the school book had a question on the concept LCM X HCF = product of the two numbers and the worksheet did not have that.
The pay will be $1 for every 5 errors found out and $1 for every missing question provided.
Considering the amount of content, we expect you to find several errors and missing question types.
The volume of work is huge, so you need to have sufficient time to take this up.
Project Type: One-time project
You will be asked to answer the following questions when submitting a proposal:
1. What is your experience and expertise in commercial work related to mathematics?
2. What is your previous experience in proofreading?
3. Why do you think you are the best person for this role?
Fixed Price
Intermediate Level
I am looking for a mix of experience and value