Hi Pennygate
You can run a Sales by Product/Service Detail select custom in the report period field and then enter the relevant date range > run report. You will then see a QTY column with a total at the bottom.
You can also run a report per product/service; select the cog icon in the top right hand corner of the screen > product and services > select the drop down arrow to the right of edit > run report > select custom in the report period and enter the relevant dates > run report