this is not possible in a tablebox, but in a tablechart. or pivot in presentation remark Suppress Zero-Values and/or Suppress missing and/or enter Set analysis: {<Year=,Month=,Week=,Fieldname=>}.
no, you can use inputfileds in tablechart or pivot, the only problem in pivot is, that there are only 150 lines possible (QV support knows this and next release or version will be here unlimited). But you have to use inputsum or inputcount, here you can alos use * or + or = or - or /.
