No one Told Me I would have to know Algebra

OK I really need help and advise.

I have a client - of course and she wants to add ratings to her site

I have added reviews see the bottom of this page

http://www.montereyrentals.com/VacationRentalsDetail.php?1042S-27

We would like to add to this a rating system - first there is over ALL rating 1-9 stars determined by the calcualtion of various questions by various guest. to get an OVERALL RATING on a specific property that would produce x number of stars depending on the calculation result from 10 questions and lets say the answer would produce 7 8 or 9 stars.

so right below PROPERTY reviews it would say
THIS PROPETY HAS AN OVER ALL RATING OF ********** (stars) - Details here

The details here would break down the 10 differnt categories they rated giving each categoy an average and produce x number of stars for that category for that property.

Quality of cookware/kitchen equipment 1 2 3 4 5 6 7 8 9[/#000000]

Condition of outdoor spaces 1 2 3 4 5 6 7 8 9

Condition of paint/wallpaper 1 2 3 4 5 6 7 8 9



so let say staff would enter in a digit it would add to the last digit and then divide by the number of entries

2 reviews one did 7 another 8 add together divide by 2 so 7 + 8 / 2 = 9 produce 9 stars and so on



WHAT DO YOU THINK????[/#000000]