Contemporary capitalism, with all of its contradictions and variability of existence, dominates the present. Even though it retained its basic characteristics of classical capitalism, its peculiarity is present in socially-productive relations that are in mutual contradiction. Modern capitalism is still capitalism. The aim of this paper is to research the relationship between contemporary capitalism and sustainable economy and to give an answer what is necessary for those two to be connected.

The appropriation of surplus products during the development of economic relations takes various forms, but basically it represents the exploitation of someone else's labor, whether that surplus labor is appropriated through kuluks (labor), in finished products (in-kind) or at a later stage of society's development in money. Hence the different names for the forms of alienation of surplus labor, such as: labor rent, natural rent and cash rent. Countries in transition, as well as those underdeveloped countries, are characterized by the collapse of large-scale commodity production and follow the development of crafts and small-scale commodity production, as well as the initial accumulation of capital, where social property becomes private.

Modern business organizations are facing a multidimensional problem of creating an accounting information system is a multidimensional problem. The presence of mathematics in solving such problems is often a necessity, which is why, in this case, mathematical relations Presence of mathematics in solving such problems is often a necessity, which is why, in this case, mathematical relations using Boolean algebra represent the basis for solving problems related to the development and functioning of an adequate accounting information system.

Despite the significant results that State Audit Institution achieved in the domain of determining regularities of doing business and truthfulness of financial reports of budget users, performance audit was given significantly less attention, which points to the necessity of developing a methodology for this discipline, as well as a technique to apply it. This contribution represents an attempt to apply a technique of finding hidden knowledge-implicit knowledge (Data mining - DM) in the process of auditing public procurement procedures and illustrating the significance of developing a technique for assessing the purposefulness of using budget assets on an example of public procurements performed in an agricultural company.

Quality of milk plays a key role in its wide consumption but also of its involvement in a large series of derived products, such as yogurt, cheese, butter, and ice cream. An effective LC-MS/MS method has been validated for the determination of 81 different pesticide residues in milk samples. The analyses comprised 44 milk samples collected during 2019. From all inspected pesticides, only metalaxyl (present in 11.36 % samples), bifenthrin and metolachlor (9.09 %), dimethoate (4.55 %), prochloraz and thiacloprid were detected in 2.27 % of analysed samples. The detections of trifloxystrobin and bifenthrin were above the maximum residue levels (MRLs). The Commission Regulation (EU) 2017/1135 standardizes the MRLs for dimethoate and omethoate in certain products, but a MRL for dimethoate residues in milk has not been established jet. All the other pesticide detections were below the MRLs.