Thank you for your post.
One of the field types is "Summary". This allows you to total/average/etc. a Number field (or count other fields). If this type of field is not present, you will not be able to specify subtotals nor totals. Make sure these fields are created. Then, put the Summary field(s) in the Sub-summary or Grand Summary parts on the layout.
Thanks, TSGal, that was exactly the problem and your instructions fixed it perfectly! Thanks so much for the quick response.