Answer: ADJUSTED CASH BALANCE PER BOOK as of January 31, 2018 is  A) $7,950
Explanation:
ABC Enterprises reconciled cash balance per books (internal accounting records as of January 31, 2018.
Cash balance as per company book    $7,500
Add:
Notes receivable collected by bank     $1000
Deduct:
NSF check                           $500
Bank service charge                   $50
Adjusted Book Balance               $7,950