Very common question. Almost everyone that compares their INV01 to the course example notices that they're off by a few units. The course example is a little dated and doesn't reflect the actual results. So congratulations on that one, you're good to go! You haven't loaded the receipts yet, so your ending inventory is going to drop month over month. So it's also okay if you have a lot of stock exceptions. As for the safety stock, you can simply change the summary to "NONE" on that line item.