otchprogress The unadjusted trial balance columns of the work sheet show the balance in the Prepaid Insurance account at $2400. The adjustments columns show that $640 of this insurance was used during the period. Assuming there is no other charge to insurance expense during the year, what amount would be shown as Insurance Expense in the income statement columns? O $640 debit. O $1760 debit. $2400 debit. O $640 credit