Writing conditional formulas

I want to compare multiple items with multiple variable and rank them using a point system.  If I enter six or seven variables, I want to write a formula to give each of these a specific point value and then get a total point value at the end for each item, to determine which item has the highest point value for the total of these six or seven variables.

In other words, I will enter a value for item A in six or seven categories, and depending on the value in each of the categories, there would be a formula to establish points for each variable, giving you a total score in point value, helping to determine which item scored highest, based on these six or seven categories.  Since each item will have a different variable for each category, I need a point to be assigned for the ranges of categories, bringing the top rated item to the top in point score.