Apple inc. has the following accounts and balances at year end (note that not all accounts are shown):

Accounts payable $1,200

Accounts receivable $3,000

Cash $10,000

Land $80,000

Salaries payable $3,500

Cost of Goods Sold $12,000

Bonds payable (due in 10 years) $45,000

Equipment (net of depreciation) $12,000

Inventory $7,500

Retained earnings $50,000

Notes payable (due in 4 months) $4,000

Sales $25,000

Compute the following based upon the accounts and balances provided (show your calculations):

Working capital

Total assets

Accounts payable turnover ratio