Erastic Corporation has $21,000 in cash, $11,500 in marketable securities, $44,500 in account receivable, $54,000 in inventories, and $49,000 in current liabilities. The corporation's current assets consist of cash, marketable securities, accounts receivable, and inventory. The corporation's acid-test ratio is closest to Multiple Choice O 267 1.57 1.34 0.91