By What Amount, If Any, Would Each of the Following

Essay

By what amount, if any, would each of the following errors cause a trial balance to be out of balance?
a. A purchase of supplies of $780 was recorded as a debit to Equipment and a credit to Cash for $780.
b. An $890 balance in Prepaid Insurance was copied to the trial balance as a debit of $980.
c. A $600 balance in Accounts Payable was copied to the trial balance as a debit of $600.