Marathon Magazine, Inc., has the following unadjusted account balances, among others, in its trial balance at December 31 of the current year: Marathon Magazine, Inc. Partial Unadjusted Trial Balance December 31 Accounts Supplies on Hand Prepaid Rent Salaries Payable Unearned Subscription Fees Subscriptions Revenue Salaries Expense Supplies Expense Rent Expense Debit Credit $3660 $1920 $0 $13500 $312000 $142500 $620 $5360 a) Prepare the adjusting journal entry necessary to show the inventory supplies on hand at December 31st is $860 Date Description Debit Credit Dec 31 l b) Prepare the adjusting journal entry necessary to adjust Prepaid Rent at December 31st if the Prepaid Rent amount in the Partial Unadjusted Trail Balance above represents one years worth of rent that was paid in advance on August 1st Date Description Debit Credit Dec 31 L