30. The following is an alphabetical listing of Blue Ivy Inc.'s accounts at year end. All accounts have normal balances. Accounts payable 60,000 Accounts receivable 58,000 Accrued payables 12,000 Accumulated amortization - buildings 88,000 Accumulated amortization - equipment 29,250 Allowance for doubtful accounts 6,000 Buildings 352.000 Cash $25,000 Common shares 250,000 unlimited # authorized, 25, 000 issued Cost of goods sold 285,600 Equipment 117,000 Held for Trading investments 40,000 Income tax expense 2,250 Interest expense 3,400 Interest income 19,750 Inventory 79,000 Land 125,000 Note payable - due in 4 years 125,000 Operating expenses 137,000 Other long term assets 21.000 Preferred shares 100,000 $0.50 preferred shares, non-cumulative, unlimited # authorized, 15,000 issued Prepaid expenses 7.000 Retained earnings 124,250 Sales 420,000 Unearned revenue 18.000 Instructions: Determine the (a) operating income (b) current assets (c) total assets (d) shareholders' equity (e) gross profit (f) current ratio (g) net profit margin (h) return on common SHE (1) debt to total asset ratio (16 marks)