I am using the API to generate daily sales and COGS reports. I am using the Clover Revenue Item Sales report to check my own calculations. The sales numbers are matching. The cost of goods sold on the Clover Revenue Item Sales report is higher than my calculated cost of goods sold for the same day and same items. I am using the field "cost" which is the unit cost for the item in the products API. Please provide assistance to help me reconcile this difference.