Drupal Quiz Module Modification

In the current multi-choice module in drupal, the score of a question is a pass or fail. I need to modify it such that the score can be given to be any number between 0-1. After that, the drupal quiz module can calculate the total score based on summing the total scores in the multi-choice questions, and divided by the total number of questions. For qualification, you (1) Must be easy to communicate and available between 7am-8pm California time. (2) Must be experienced in Drupal, php, mysql, drupal module development (3) Must be competitive in cost and devliery