Insufficient data for expense calculation Steps:

• Review the query for expense details or financial records up to 31 December 2017.
• Identify any income statements, ledgers, or transaction lists provided.
• Sum relevant expense categories if data exists.
• Compare total to given choices.

Why the correct option is correct:

• Not enough information to determine any option.

Why the others are wrong:

• A: No basis to verify $320 as total.
• B: No basis to verify $470 as total.
• C: No basis to verify $180 as total.
• D: No basis to verify $830 as total.

Final answer: Not enough information.