Decision Tree and Supply Chain Exam

$1$

$5$ points

Solve the decision tree below so as to portray the decision strategy with the highest expected paxoff. $($Note: A$,$ B$,$ C$,$ J$,$ K designate alternative choices. D$,$ E$,$ F$,$ G$,$ H$,$ L$,$ M designate uncertain events.$)$

What is the calculated amount at node $1?$

$30$

$40$

$60$

$10$