Are custom metrics calculated at the respondent level?

Within dashboards/custom metrics, I'm trying to calculate a score using custom metrics based on a respondents answers from 2 questions.
Q1 - How many points would you assign to each of the 8 attributes listed (0-100)
Q2 - Matrix with several brands listed in the column headers and the 8 attributes listed in the rows -- For each attribute, select the brand(s) that apply.
The goal of the "score" is to award points to the brands based on how the respondent allocated points to the attributes and then associated the attributes to the brands.
Here's what I came up with but I haven't verified it works yet.