Manage Student Fee

Hi there I have senerio each student have unique fee so does anybody knows how to manage it in education module

another thing when i created fee schdule and submited then it show create sales invoice instead of create fee

i have many confusions regarded to

{
	"frappe": "15.91.0",
	"erpnext": "15.91.0",
	"education": "15.5.3",
	"hrms": "15.52.5"
}