Hi Mohammed
let me explain u in brief abt Per diems concept. normally Per diems are nothing but company paid amounts to employee with hourly or daily rates defined in it which we reimburse after the Trip. Per diems can be based on Food, Accommodation, Transportation (own car) etc. for these expenses we need to maintain rates manually in the system
Tables for Perdiems:
V_T706U (Accommodation rates), V_T706V. V_T706B1_A , V_T702N_J, V_T702N_D
In your case u have already mentioned rate if a person stays one day in hotel the rate is 80$ & at the return day he will get 50$, so u need to maintain based on the hours in your system. so when the expenses are settled the employee must get 130$ if he stays overnight & returns back on the next day. maintain V_T706U.
in the above case I've defined rates for Meals on all 365 days. for one country. In the same way u need to also define the rates for each expense type. Let me know if u still have doubts
Hope this Information
will be useful
Cheers
Pradyp