Answer :
A difference in the subject matters of operas X and Y
Explanation:
A difference in ticket prices , operating expenses , merchandise sales with operas X and Y could directly explain the result indicated about the given statement.
The costs of goods produced is typically included in the balance sheet as a separate item. The residual expenditures not included in COGS are operating expenses. Customer selling is carried out by merchandising, whereas the term "sales" applies to a customer who simply purchases a product and performs a buying transaction.