BE3.9 ( LO 2), AP The unadjusted trial balance of Northern Exposure Inc. had these balances for the following selected accounts: Supplies $3,100, Unearned Service Revenue $8,200, and Prepaid Rent $1,200. At the end of the period, a count showed $500 of supplies on hand. Services of $2,900 had been performed related to the unearned revenue account, and one month's rent, worth $400, had been consumed by Northern Exposure. Record the required adjusting entries related to these events