Drew Rosen Corp. is considering adding a fourth plant to its three existing facilities in Decatur, Minneapolis, and Carbondale. Both St. Louis and East St. Louis are being considered. Evaluating only the transportation costs per unit as shown in the table, decide which site is best.

From Existing Plants

To

Decatur

Minneapolis

Carbondale

Demand

Blue Earth

$20

$17

$21

250

Ciro

$25

$27

$20

200

Des Moines

$ 22

$25

$22

350

Capacity

300

200

150

From Proposed Plants

To

East St. louis

St. louis

Blue Earth

$29

$27

Ciro

$30

$28

Des Moines

$30

$31

Capacity

150

150