Solid Rock Construction has current assets worth $$7$ million, including $$4$ million in inventory. The company has current liabilities of $$5$ million. Its quick ratio is Blank$\_\_\_\_\_\_.$

Multiple choice question.

$0\mathrm{.}60$

$1\mathrm{.}40$

$7\mathrm{.}40$

$0\mathrm{.}20$