printing quanity/price fields in smart forms

yes i have seen few threads on this subject line.... my question is

though i can read english, but could not understand what they mean here.....

http://help.sap.com/saphelp_nw70/helpdata/en/0b/5da4e42cf511d5b692006094192fe3/content.htm

have solved the problem by using program lines, changing the qty and prices into character variable and printing it.

still i would like to know ... what SAP intented to say by this..............

http://help.sap.com/saphelp_nw70/helpdata/en/0b/5da4e42cf511d5b692006094192fe3/content.htm

if possible can some one help me understand it.

thanks

sai