Stine Corp.'s trial balance reflected the following account balances at December 31, 2015:
Accounts receivable (net) $24,000
Trading securities 6,000
Accumulated depreciation on equipment and furniture 15,000
Cash 16,000
Inventory 30,000
Equipment 25,000
Patent 4,000
Prepaid expenses 2,000
Land held for future business site 18,000
What is the balance of the current assets on Stine's December 31, 2015 balance sheet?