Nick's Place recorded the following data:

Date $,$ Received Sold

$\frac{1}{1}$ Inventory

$\frac{1}{8}$ Purchased $,1,000$

$1/12$ Sold

$1,200$

On hand

$600$

$1,600$

$400$

Unit Cost

$$2\mathrm{.}00$

$$2\mathrm{.}40$

The weighted average unit cost of the inventory at Januayr $31$ is:

$$2\mathrm{.}25$

$$2\mathrm{.}20$

$$2\mathrm{.}40$

$$2\mathrm{.}00$