Make a test Query1 with one check box field from your data and make the filter criteria = true.
Next make another query2 based on the one above where there is only one field in the QBE grid which is MyCount:Count(CheckBoxName)
This will tell you the total number of Yes/True responses in CheckBoxName
If you know how to use SQL, you could write the code for a whole number of these check boxes; alternatively, write a query for each one .. but that will be a lot of queries so the SQL route will be better.