charge patients for bed

Is it possible to create a product “Bed-Days” in OpenERP and charge the patient according to days he has stayed in the hospital without having to enter the time in OpenERP again? So basically similar like the information for drugs & lab tests are transferred from OpenMRS to OpenERP it would be handy to transfer the data about the time an in-patient stayed in the hospital from OpenMRS to OpenERP. Even better if that can be done by location. So a day in a private ward would have a different price than a day in general ward.

Right now Bahmni does not have the provision to auto charge patients for Beds based on Admission/Discharge timings & location.