The Gross Spend total is calculated by adding subtotals of every check sent to Punchh that the Promo code was applied to. This number is calculated before the discount is applied to the check.
The net spend is the remaining Subtotals left post redemption.
If you deduct the Discount amount from the Gross Spend / Subtotals the remainder will be the Net Spend.
Note: If you pull a campaign data export form a Promo Campaign the Subtotal amount in the export is the same as the Gross Spend on the Campaign Show page.
If further assistance is required, submit a ticket to Punchh Support. (For help submitting a ticket, click here)