In this paper, we focused on the use of model calculations to simulate the process of the production and costs of production for cultivation of tomato, cucumber and sweet pepper. With the help of model calculations embedded functional dependencies we tried to find out how three different factors (the price of packaging, manual labor and the size of the market yield) influenced the economics of production. The results of assessment of costs and income have shown us that the selected factors affect economic performance. On the basis of the results, we estimate that model calculations are appropriate tool for evaluation of economics of production, which allow us optimization of production processes.