Sold: transaction generated when you posted a trip containing this product. The system nicely displays also the number of the Trip as a link and when you click it it opens Enter Trip Results screen. So it is easy to review and modify trip input data if necessary.
Empty: transaction generated when you take out a product from a machine and return it to the warehouse. For example: if you change a product in a machine and you return the remaining quantity of previous product to the warehouse; or if you remove a machine from location and you have to empty it. Use field Emptied (returns) on Enter Trip Results screen, in the detailed edit selection dialog.
Write-Off: transaction generated when you remove bad (damaged or expired) products from a machine or from your warehouse. Use field Bad (discarded) on Enter Trip Results screen, in the detailed edit selection dialog to remove products from machine or Write-Off command on Inventory screen to remove products from warehouse.
Adjustment: transaction generated when you perform some warehouse stock adjustment (for example based on stock-taking), using Adjust Product Quantity functionality. Adjustment type records can be removed directly from History by clicking
icon at the end of the row.
Quantity: transaction quantity. Negative for Write-Off. Negative or Positive for Adjustment. Positive for rest of the types.
Unit Cost: TODO
Total Cost: Calculated. Total Cost = Quantity * Unit Cost
Description: displays some additional info depending on transaction type: Reason or Location for Write-Off, Location for Sold and Empty, Supplier for Purchase, Reason for Adjustement.