I need the weighted average perpetual. Calculate the cost of ending inventory, cost of the goods sold, and gross profit

Bridgeport Corporation opened a new store on January 1, 2021. During 2021, the first year of operations, the following purchases and sales of inventory were made: Purchases Sales Date Units Cost per unit Date Units Price per unit Jan. 5 12 $1,000 July 4 15 $2,000 June 11 12 1,180 Dec. 29 33 2,000 Oct. 18 14 1,300 Dec. 20 21 1,550