Stock return rates may be found under the Evaluations tab, if you can not locate it there you will need to Edit Menu Entries.
Choose an Organizational Unit to run the report for, you may choose a Commodity Group, Product, and Day of the week or you may leave the defaults set to <all>. Once you have made your selections click on Update. This report should be listed on the right-hand side as well as displayed in a Bar Graph format on the left-hand side.
The information displayed is as follows: Product, Sales, Stock Return (count), Stock Return Rate (%).
Note* graph reports may not be exported.