Official comment

Dashboard Metrics can provide something close to what you are looking for, but they are not (yet) able to be exported. You can create a metric for each product and view them on the Dashboard.
The time frames available include Today, Yesterday, Last 7 Days, This Week, Last Week, Last Week to Date, This Month, Last Month, Last Month to Date, Last 30 Days, Last Year, Last Year to Date, Year to Date or Any Date Range. You can cycle through the date ranges by clicking on the metric, or create multiple metrics for a range of dates:
This screen capture shows cycling through the date ranges on a single metric: http://screenshot.ontrapedia.com/public/fhagan/1490710532.mp4
To create the metric you select "Total value of something across contacts" and choose the default time frame. Then, add a "Trigger" for the product purchased as shown here:
For other feature requests for better reports in the Sales Reports area; please search our feature request forum for "Sales Reports" and vote on them.