Finished 20 problems but stuck on these 3.

1. Osborn Company's unadjusted book balance at June 30, 2009 is $7,800. The company's bank statement reveals bank service charges of $45. Two credit memos are included in the bank statement: one for $900, which represents a collection that the bank made for Osborn, and one for $50, which represents the amount of interest that Osborn had earned on its interest-bearing account in June. Based on this information, Osborn's true cash balance is:
a. $7,800.
b. $8,705.
c. $8,650.
d. $8,795.

2. Dent Company's unadjusted bank balance at March 31, 2009 per bank statement is $3,000. The bank reconciliation revealed outstanding checks amounting to $500 and deposits in transit of $400. Based on this information, Dent's true cash balance is:
a. $3,100.
b. $2,700.
c. $2,800.
d. $2,900.

3. Rich Company's unadjusted book balance at October 31, 2009 is $2,500. The following information is available for the bank reconciliation:
Outstanding checks, $600
Deposits in transit, $450
Bank service charges, $90
The bank had collected an account receivable for Rich Company, $1,000
The bank statement included an NSF check written by one of Rich’s customers for $600.

Based on this information Rich’s true cash balance is:
a. $1,050.
b. $3,590.
c. $2,810.
d. $2,860.

1) Ans: B (7,800 - 45 + 900 + 50 = 8,705)
2) Ans: A (3,000 + 500 - 400 = 3,100)

3) This looks pretty tricky! I dont get the right answer. If anyone knows plz reply. Thx