How to remove zero value sales from direct sales report?

How to remove zero value sales from direct sales report?

My business offers a number of gift products to corporate houses and other businesses that we maintain by including zero value invoice while creating an order. The inventory gets adjusted after creating a package and shipment as intended, but the direct sales reports contains the selling price even though the invoice amount is zero for those particular product(s). And i'm getting a mismatched report with my actual sales at the end of the month. Is there any way i can have the zero amount invoices removed from the direct sales report in zoho?