How do you calculate banks undivided profits?

Gross Loans $300

Miscellaneous Assets $50

Deposits $390

Total Equity $50

Common Stock Par $5

Non-Deposit Borrowings $60

Investment Securities $150

Net Premises $40

Surplus $5

Allowance for Loan Losses $50

Deposits $390

Total Assets $500

Gross Premises $70

Given this information, what is this firm's Undivided Profits?

A) $50

B) $5

C) $10

D) $40

E) $450