Please help:

Super Auto Company rented a warehouse in Halifax, NS to store its engines valued at $500,000. The engines need to be shipped to the Montreal, QC, plant. The annual holding cost rate for auto engine has been estimated at 15%. There are five shipping companies available. Their delivery time and costs are listed in the table below. Which carrier is most economical?

Carrier

Delivery Time (Days)

Cost

A

20

$500

B

15

$800

C

12

$1200

D

8

$1600

E

5

$2000