Hi all, hope you can help me.   I got a table with several columns and I want to make a sum based on each one without making a new column for each variable. (see attached table)   12,5% 12,5% 12,5% 6,8% 7,3% 8,3% 6,5%   Illiteracy school absenteeism school backwardness aqueduct_problems Sewerage_problems Floors Walls Sum       YES   YES YES 21,6%   YES YES YES YES     39,1% YES   YES YES     YES 38,3%   I want to get the sum of the row according to the weight assigned and the value of the field (e.g. in the first row we add aqueduct_problems, Floors and Walls getting 21.6%)   is there a way to do it?  many thanks!! ... View more