$($b$)(5$ pts$)$ Find the inventory level at the end pf next year

$($A$)59$

$($B$)61$

$($C$)266$

$($D$)406$

$($c$)(5$ pts$)$ Compute the total cost $($including hiring$/$firing cost and inventory cost$)$ under the constant workforce plan for next year.

$($A$)$ $$89060$

$($B$)$ $$103350$

$($C$)$ $$124420$

$($D$)$ $$145500$