Arbitrary reference number assigned to the resulting variable (2 to NV [NUMVAR]). If this number is the same as for a previously defined variable, the previously defined variable will be overwritten with this result.

Reference numbers of the three variables to be operated on. If only two variables, leave IC blank. If only one, leave IB and IC blank.

Thirty-two character name for identifying the variable on the printout and displays. Embedded blanks are compressed upon output.

Unused fields.

Scaling factors (positive or negative) applied to the corresponding variables (default to 1.0).