Aged 16-74. CXLS1 - Using spreadsheet software
or
CXLSADV1 - Using advanced features of spreadsheet software (functions, formulas, macros, Visual Basic) to organise, analyse, structure or modify data
  1 - Ticked
  0 - Not ticked
  9 - Not applicable (IU=Blank or IU ne 1)

Individuals Spreadsheet software
sum of IND_WGHT where (CXLS1=1 or CXLSADV1=1)