If you answer this questions i'll answer as much questions from yall as possible

$22.20 Aiden 
54.40 his sister
his sister spent more 

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .