To view the items you bought over the time you can go to the purchase report.
Purchasing > purchase report
In this report you can filter by date of the purchase order, supplier invoice, document date or goods received note.
All the offered columns: date, document number, SKU, item description, quantity, product category, trademark, warehouse, supplier, category, purchase amount, discount amount - can be grouped or filtered in order for you to generate various reports.
You can add/remove columns, group/sub-group columns, export the list to xls, save to G-drive, print or download as PDF.