M
NATURALINNERJOIN(
SELECTCOLUMNS('lk order',"user_id",'lk order'[user_id],"price_paid",'lk order'[price_paid],"paid",'lk order'[paid]),
SELECTCOLUMNS('lk worker_branch',"user_id",'lk worker_branch'[child_id],"p_id",'lk worker_branch'[parent_id],"level",'lk worker_branch'[level])
),
"sum",[price_paid])