Blue Company uses a periodic inventory system. For April, when the company sold $500$ units, the following information is available.

Units

Unit Cost

Total Cost

April $1$ inventory

$290$ $$32$ $ $9,280$

April $15$ purchase

$4303816,340$

April $23$ purchase

$280$

$42$

$11,760$

$1,000$

$$37,380$

$($a$1)$

Calculate weighted$-$average cost per unit. $($Round answer to $2$ decimal places, e$.$g$.2\mathrm{.}76.)$

Weighted$-$average cost per unit

$enter the weighted$-$average cost per unit in dollars rounded to $2$ decimal places