**Category:** Organic Chemistry  
**Subtype:** Chemical Reactions (Ester Reactions)  
**Problem Description:** The problem involves a mixture of two esters containing benzene rings, with given molecular formulas. It requires calculating the mass of the resulting mixture of salts after a reaction with potassium hydroxide (KOH). Specifically, it asks for the mass (m) of the salts produced when reacting 0.2 moles of the ester mixture with a maximum of 0.35 moles of KOH.