A Firm Has $4,500 of Cash, Equipment Worth $42,000, Inventory

A firm has $4,500 of cash, equipment worth $42,000, inventory of $16,700, patents worth $12,200, and $15,600 of accounts receivable. What is the value of the total current assets?

A) $2,500
B) $24,700
C) $36,800
D) $40,000
E) $62,900