Double XLOOKUP in Excel

I have an Excel-workbook containing two sheets:

• One sheet contains the names of students with their evaluation

• And a second sheet containing the "mappings" between the criteria and the possible values with their corresponding score

So basically, I need to lookup the name of the criteria in the Students-sheet to "return" the columns of the criteria. Within these colums, I need to look for the value and return the corresponding score.

Based on my 'Students' sheet, how can I calculate the total score for each student?

Thank you very much!