i am confused of having two answers

The following information was taken from a companys bank reconciliation at the end of the year:

Company balance	$ 7,000
Checks outstanding	5,500
Note collected by the bank	1,500
Service fee	20
Deposits outstanding	4,000
NSF check from a customer	200

What is the correct cash balance that should be reported in the company's balance sheet at the end of the year?

1. $8,300
2. $8,280
3. $6,780
4. $12,280 this one has the answer of b 8280

but this question has the answer of c 6200

The following information was taken from a company's bank reconciliation at the end of the year:

Bank balance $ 8,000 Checks outstanding $ 5,800 Note collected by the bank $ 1,500 Service fee $ 20 Deposits outstanding $ 4,000 NSF check $ 300 What is the correct cash balance that should be reported in the company's balance sheet at the end of the year? A) $10,200. B) $7,400. C) $6,200. D) $6,160

why one uses Cash balance = Bank balance + Deposits outstanding - Checks outstanding and other don't?