Answer:
$40,000
Explanation:
Current assets  are liquid assets which can easily be converted into cash within a year and examples are cash, cash equivalents, debtors or account receivables, and inventory ( raw materials, work in progress and finished goods). In this question, we exclude the unpaid raw materials  of $14,000 as they are not a current asset but are a current liability.
Therefore: Current assets are Cash balance plus accounts receivable plus finished goods inventory plus raw materials inventory = $4,000 + $16,000 + $12,000 + $8,000 = $40,000