d. Feb. 2-business paid a $450 deposit for the last month's rental of a copier on a 10-month contract. Nov. 30-the rental period for the copier ended, so the balance in the prepaid account must be updated. e. Jun. 1-purchased truck for $39,900 (cash) with an expected useful life of seven years. f. Dec. 31-year-end adjusting entry needed to record amortization.