PHP MySql, need a login area where employees enter payment info and boss can generate basic reports.

We would like a system designed by which contractual workers can login to a private area, fill out a "payment form". This payment form submits information about the worker's client - such as name and amount paid. This data should be saved to a database. The system must allow the business owner to generate reports to see how much the worker was was paid by clients and how much is to be paid to the worker by the owner. - Owner must be able to add/remove workers and set worker commission rates. - The system should be PHP/MySQL based - No online payment functionality needed, reports only. - Cosmetics are not vital, functionality is what we're looking for - Existing code (such as open source) may be used provided there are no copyright restrictions ## Deliverables Other project details: Once logged in, the worker should be able to select their name from a dropdown list and enter the client data. These data are Client Name, Date, Amount Received ($). Owner should be able to select an arbitrary time frame for the reports (eg. July 1, 2010 - Oct 15, 2010) Owner should be able to alter/correct data submitted by worker. Workers sometimes pay for the rental of the owner's facilities (hourly rate) when serving clients. There should be a field for the owner should be able to add this cost to the worker and displayed in the reports so it can be deducted from the worker's commission. Coding should be "clear" and use standard practices so that future modifications can be made without deciphering a cryptic programming style.