Paddington Gifts made purchases of a particular product in the current year as follows:

Jan. $1$ Beginning inventory $260$ units @ $ $6\mathrm{.}20=$ $ $1,612$

Mar. $7$ Purchased $520$ units @ $ $5\mathrm{.}80=3,016$

July $28$ Purchased $1,200$ units @ $ $5\mathrm{.}20=6,240$

Oct. $3$ Purchased $880$ units @ $ $4\mathrm{.}60=4,048$

Totals $2,860$ units $ $14,916$

Required:

$1.$ The business uses a periodic inventory system. Ending inventory consists of $110$ units. Calculate the costs to be assigned to the ending inventory and to goods sold under: $($Round intermediate calculations and final answers to $2$ decimal places for "Weighted average cost".$)$