REI sells snowboards. Assume the following information relates to REI's purchases of snowboards during September. During the same month, $98$ snowboards were sold.

$\backslash$table$[[$Date$,$Explanation,Units,Unit Cost,Total Cost$],[$Sept$.1,$Inventory,$12,$$$102,$$$1,224$

Calculate the weighted$-$average unit cost. $($Round answers to $3$ decimal places, e$.$g$.5\mathrm{.}125.)$

September $1$$

September $5$$

September $12$$

September $16$$

September $19$$

September $26$$

September $29$$