The purpose of this study is to explore more deeply the application of cooperation, explore the calculation of rice production costs in the field, and compare the calculation of profitability between the field and the sharia perspective. The application of cooperation is carried out using the theory of muzara'ah contracts and verbal agreements. This study uses a qualitative method with semi-structured interviews. Purposive techniques are used in this study. Informants in this study amounted to 8 people consisting of 4 land owners and 4 tenant farmers. Researchers conducted research in two sub-districts, namely Wuluhan District, Ampel Village and Ambulu District, Andongsari Village in Jember Regency because the majority of the population works as farmers and the geographical conditions of agricultural land are quite extensive and large. The research period was around August-November 2025. The calculation of profitability according to the customs of the community in Wuluhan District, Ampel Village and Ambulu District, Andongasari Village gave rise to a phenomenon where one of the sharecroppers felt dissatisfied because they were not included in the calculation of profit/profitability due to unequal access to information, unwritten agreements/contracts, unwritten profits and the dependence of sharecroppers on landowners. Sharecroppers considered the formula that did not directly consider their hard work, they felt dissatisfied. This requires calculations in accordance with sharia principles using Gross Margin (GM) and Net Farm Income (NFI). However, landowners and other sharecroppers were satisfied with the calculation of profitability according to the community's daily habits because it was in accordance with the theory of Profit and Loss Sharing.