A manager at Strateline Manufacturing must choose between two shipping alternatives: four$-$day freight and seven$-$day freight. Using seven$-$day freight would cost $$160$ less than using four$-$day freight. The primary consideration is holding cost, which is $$10$ per unit a year. $1,800$ items are to be shipped. Which alternative would you recommend?

Delivery alternative Four$-$day freight

seven$-$day freight