Solution:
Use the following steps to activate the feature in FusionRetail6:
- Go to Main Menu > Warehouse Management > Transaction > Stock Journal (W> T> S)
- Press Alt+ O for Stock Journal Option.
- Set “Calculate Cost from Recipe = yes”
- Save.

Note: It will calculate cost based on last rate in stock register.
For more details please visit: http://www.rancelab.com/help/fr6_production_consumption.htm