using same bind variable [page item?] in several reports

i have written several charts, listing tuition assistances approved by several criteria, e.g totals by department, by degree program, ethnic_origin etc.

each chart drills down to data for each request: approved total amount, employee, school, course, etc. and grouping by above criteria, e.g. department, degree program, ethnic origin of these details.

then on each one of these reports the request_no field is a link field that when clicked will load a report listing more details for the request, e.g cost of each item in request, a description of each item, etc.

the same details report could be used each, e.g. when clicking from requests by department, or by ethnic_origin, etc