The DEFINE statement for Pctsum specifies a column header, a format,
and a column width of 8. The PERCENT. format presents the value of Pctsum
as a percentage rather than a decimal. The DEFINE statement for COMMENT defines
it as a computed variable and assigns it a column width of 20 and a blank
column header. The FLOW option wraps the text for COMMENT onto multiple lines
if it exceeds the column width.
define pctsum / 'Percent of Sales' format=percent6. width=8;
define comment / computed width=20 '' flow;