When entering sales data in Backbar, the time periods for sales data are determined when you have completed and saved inventory sessions.  This feature accomadates category level sales data entry to provide a Cost of Goods Sold (COGS) percentage at the category level only: Wine, Beer, and Spirits

All time periods are based on time between your confirmed closure timestamps on invenotry sessions. If you take inventory monthly, you can enter sales data for monthly periods. Or, weekly if you take and close each week.

Backbar uses the sales data to calculate Cost of Goods Sold in the Cost of Goods Sold Overview report found under Inventory Reports. 

For accurate Cost of Goods Sold data, you need to keep accurate inventory counts, put orders into Backbar, receive them at the correct dates, and match the sales data from your POS with inventory session time periods.

To add your data manually, navigate to Sales > Dashboard and click Enter sales data manually.

You will then be brought to your Manage Sales Data screen for manual entry.  The dates on the page correspond to your confirmed inventory timestamps and you must pull a POS sales report for Beer, Wine and Spirits totals for the same time periods. Click the pencil icon to open the entry form for that period.

After entering you totals Backbar then compares your Usage data to determine an average COGS value for each category.  Note, this page will not update with POS integration, this is for manual sales entry at the category reporting level only.

The sales-based COGS report is on the Sales reports tab and is built automatically with usage from Backbar inventory and item level sales data from the POS integration.