Hello MMK48! It's great to have you here in the Community forum. And I appreciate the effort you put into providing detailed information about your concern along with a screenshot.
I'm here to assist with your issue regarding the Item QuickReport as to why the pledges are displayed as a minus on the report.
When you generate an Item QuickReport in QuickBooks Desktop (QBDT), the negative value displayed in the QTY column indicates the number of times you have utilized that particular item on an invoice where the amount is also negative.
If you'd like an overview of how your business is doing using QBDT, you can check out this article: Understand reports. And if you'd want to personalize the report based on your needs, you can do so by following the steps in this article: Customize reports in QuickBooks Desktop.
If you have further questions about the negative amounts showing on the Item QuickReport, let me know by commenting below. I'll be here to answer them for you. Have a great day!