Multistore: this field is store-specific.
This field on the History tab of Inventory Maintenance is the quantity (in stocking units) you purchased from all vendors (other than the primary vendor) last fiscal year.
The Receiving Report (RRP), Option F updates this field. This is the quantity (in stocking units) you purchased from all vendors (other than the primary vendor) last fiscal year.
Report RRP (Receiving Report), Option F updates this field.