Problem VI$\mathrm{.}3.$e

$1$ punto posible $($calificado$)$

What is the best operating strategy for this system? To answer this question, one approach is to just enumerate all of the $$all$-$or$-$nothing$$ strategies and find the best. One could also set up as an optimization problem but this is not necessary to answer the question and is more than is expected. By checking the box$($es$),$ indicate at which stage$($s$)$ you hold a safety stock: