Given the Table Below,indicate the Impact of the Following Errors

Essay

Given the table below,indicate the impact of the following errors made during the adjusting entry process.Use a "+" followed by the amount for overstatements,a "-" followed by the amount for understatements,and a "0" for no effect.The first one is done as an example.
Ex.Failed to recognize that $600 of unearned revenues,previously recorded as liabilities,had been earned by year-end.
1.Failed to accrue salaries expense of $1,200.
2.Forgot to record $2,700 of depreciation on office equipment.
3.Failed to accrue $300 of interest on a note receivable.