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Cortina Company accumulates the following adjustment data at December 31. Indicate (1) the type of adjustment (prepaid expense, accrued revenue, and so on) and (2) the status of the accounts before adjustment (for example, "assets understated and revenues understated")(Enter your answers in alphabetical order.) (1) Type of Adjustment Accounts Before Adjustment (a) Item Supplies of $400 are on hand. Supplies account shows $1,600 balance. . (b) Services performed but unbilled total $700. . o c (c) Interest of $300 has accumulated on a note payable. o O (d) Rental services related to rent collected in advance totaling $1,100 have been provided. o