# Summary Sales by Part or Model (SALES.R2)
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The SALES.R2 procedure provides a summary listing of shipments by part or model number for the period specified. You may limit the items included in the listing to specific part numbers.
Frequency of Use
Part Number The part number of the item shipped.
Model The model number associated to the part.
Ship Qty The total quantity from all shipments for the part.
Revenue The total dollar amount from all shipments for the part.
Cost The total dollar cost from all shipments for the part.
Gross Margin The difference between the revenue and cost, reflecting the total gross margin for the part.