Hi SergeiG,
Thanks for reaching out here. QuickBooks Online provides several reports for each area of your books. You can view the inventory values at a glance. Here's how:
1. From the left menu, open Reports
2. In the Search field, type and enter Inventory valuation detail
3. Click Customize
4. Choose the Report period
5. Select Change columns, to select what you want to see
6. Open the Filter to choose your preference to filter by Product/Service, or Service Date
7. Hit Run report
As you'd stated you have multiple questions, I encourage you to contact our Customer Care team. With your consent, they'll be able to work with you in real time, and ensure you're able to accomplish your QuickBooks goals as soon as possible!
Feel free to reach back out, if you have any other questions or concerns. We're here to help!