This toy problem is presented only to illustrate how GAMS lets you model in a natural way.
GAMS can handle much larger and highly complex problems.
Only a few of the basic features of GAMS can be highlighted here. Here is a standard algebraic description of the problem, which is to minimize the cost of shipping goods from 2 plants to 3 markets, subject to supply and demand constraints. The use of consise algebraic descriptions makes the model highly compact, with a logical structure. Internal documentation, such as explanation of parameters and units of measurement, makes the model easy to read. Your comments are automatically incorporated into the output report, at the appropriate places.