MIP modeling

Hi everyone.
I’m a beginner at gams modeling. I tried to model an MIP problem using gams and I got so many errors. The mathematical model and the gams code is attached to this message. Could anyone please help me get rid of some of the errors.
Thank you
ReportPrinter Report2.pdf (84.4 KB)
Mathematical Model.pdf (507 KB)
Final.gms (10.1 KB)