The director has asked us to send monthly ___ to Mr. Jefferson in the finance department.

In business and finance, a statement is a summary of financial transactions or status, usually issued monthly. It includes data such as income, expenses, or account balances. When the director asks to send monthly records to someone in the finance department, the correct term is "statements." These help track financial performance or verify transactions. Thus, "statements" fits best in this formal, accounting-related context.