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A review of the bank statement and accounting records of the Blake Company revealed the following items:
Item No. Description

1) Three outstanding checks
2) A debit memo showing a bank service charge
3) A deposit in transit
4) An NSF check written by one of Blake’s customers
5) A certified check written by Blake
6) A credit memo reflecting interest revenue earned by Blake
Which of the item(s) would be subtracted from the company's unadjusted book balance to determine the true cash balance?

a. Item numbers 2 and 4.
b. Item numbers 2, 4, and 5.
c. Item numbers 1 and 4.
d. Item numbers 1, 2, 4, and 5.