In the Reports section click on Income Statement

At the top of the Income Statement page, choose a report format, like This Year. Choose a report by Item.

You can also choose to further customize this report by Income or Expenses under the Focus area. Leave this field blank if you would like a report with both income and expense categories.

You will get a breakdown of your items by quantity and amount.

To learn how to create items, please see the article Setting Up Items.