Setting Non-perpetual Inventory in SAP Business One

Dear SAP partners,

Do you know how to setup non-perpetual inventory in SAP Business One?

I have tried to uncheck "Use Perpetual Inventory" in Administration > System Initialization > Company Details > Basic Initialization but SAP shows "item cost cannot be base price origin for gross profit calculation".

I also have tried to uncheck "Calculate Gross Profit" in Administration > System Initialization > Document Settings > General but SAP still shows "Item cost cannot be base price origin for gross profit calculation".

Thank you for your help.

Regards,

Jimmy