dynamic length report

i have POS printer 80mm=3inch wide and length is role paper more 15 memter.
i just want to make a receipt for general store.
i want to print according to items purchsed by customers i.e some buy one thing , some buy more than one thing, i want a dynamic page length receipt according to no. of items purchased.
please help me.

Normally as more detail/group items are presented to the report template, the report grows in length.  Not sure what the issue is.

Actaulyl i want to stop wastage of paper.
report header+ detail item+ report footer= length of paper.
i think you got me

Not sure Crystal can adjust paper size automatically.  I cannot think of a way to do this.

There is a way to set up in built-in cuter and print a slip as a requirement. If your POS Printer does not work then contact to Ricoh printer support to solve your problem and they can also set up your POS machine as your need.