wordpress royalty system (have build with previous freelancer)

Simple Royalty reward system on wordpress: brieft description: there is 3 type of account (business owner who is admin, merchant, and members). 1. Whenever member visit certain merchant outlet, the merchant will record bill amount and member id. the system will record everything and a. rebate some point to members according to the bill amount. b. calculate commission for business owner. attachment file is the first version of the proposal just for your reference, just ignore it, it has many modification already. The system was built with previous freelancer. the system have some bug when i update to wordpress 3.5. task: 1. please fix the bug of wordpress 3.5. 2. some simple modification such - when merchantt delete the transaction, admin must have to know. - do not round up the amount 6.1 to 6. - change new theme from u-design to avada theme, the portfolio doesn't work, please fix, - some text changing, menu re-arrangement. - front end user registration - and some simple modification to the system.