This paper presents exergy, exergoeconomic, and exergy cost sensitivity analyses of a cogeneration solar power plant cycle, along with a detailed parametric study based on Exergy Cost Theory. Mathematical models addressing mass, energy, exergy, and economic parameters were developed and presented. The thermodynamic properties and associated analyses were conducted using Thermax, Excel, and MATLAB Simulink software tools. The findings provide valuable benchmarks for evaluating the economic performance of the plant. Sensitivity and parametric analyses reveal that the exergoeconomic factor, total annual plant cost, and unit costs of work and steam increase with a higher interest rate, while they decrease as the annual operating hours rise. The solar direct steam generation analysis demonstrates that the exergoeconomic factor values are 0.64 in January and 0.34 in July, with corresponding total costs of $3010.4/hr and $5480/hr, respectively. These results offer significant insights into the parametric influences and their effects, providing practical guidance for site engineers and operators. This study highlights the interplay between energy, exergy, and cost, assisting professionals in optimizing plant performance while managing resource and economic trade-offs effectively.