PHP Fix script - Calculation based

Hello All - I have a script that is displaying standings for user based on selections that made that were correct. Each week they select x amount of contests, and the page displays how many they selected correctly. When they submit their entry, they also select a number that is stored in another table. I want to get the average of the numbers that they selected and use that to determine another column value. This is an american football pool. The users make a guess on what they think the final total score for the last game of the week will be. I have already created the average score for the last game of the week and able to see it in the calculation. Now I need to get the users average guess and subtract it from the actual average score of the last game of the week. This should just be a function to get the average number for each order and bring it to the webpage where I am displaying the value. I have come close to getting it right, but struggling on getting each user. I can get one user though and it displays the same for all users. I believe this is a very quick project. Probably a few minutes for the experienced. Please do not blind bid and expect to negotiate the bid. Whatever you bid will be what I will expect to pay.