The production process is as follows. Initially, the company has $0$ trucks in their garage, which has a maximum capacity of $3$ trucks per season. Since the production is time$-$consuming, the company can produce $$ in $\{0,1,2\}$ trucks each season before the demand is revealed. The production has a fixed cost of $$30$k and a variable cost of $$20$k per truck in any season. After the production occurs, the demand level $$ becomes known. Each available truck in the garage is sold for $$100$k units. All unsold trucks in spring or summer are kept for the next season with $$10$k of holding cost per truck per season. All extra trucks at the end of the fall are sold for only $$50$k$.$