Syntax equation

Hi there,

I am practicing building IO model by using GAMS.
I try to formulate equation syntax to represent IO, but I cannot do it.
So I cannot let program to calculate x1,x2,x3,m,w,depr and profit per sector.

I attached my GAMS file. Could you please advise?
Thank you so much

Best regards,
IO table.gms (3.4 KB)