Answer:
Annual inventory cost = $ 800.
Step-by-step explanation:
Demand, D = 4000
Order cost, S = $ 20
Holding cost, H = $ 4
EOQ = sqrt(2 * D * S / H)
= sqrt(2 * 4000 * 20 / 4)
EOQ = 200
Annual inventory cost = Annual setup cost + Annual holding cost
= (D/Q * S) + (Q/2 * H)
= (4000 / 200 * 20) + (200 / 2 * 4) = 400 + 400 = $ 800
Annual inventory cost = $ 800.