20 A truck with the capacity to load 2,200 cubic feet of cargo is available to transport items selected from the following table.

ITEM VALUE VOLUME (cu. ft.)

A $1,800 700 B $1,400 600 C $1,100 450 D $ 900 400 E $1,600 650 F $1,100 350 G $1,200 600 If selected, an item must be shipped in its entirety

(i.e., partial shipments are not allowed). Of items B, C, and D, at least two items must be selected.

If item B is selected, then item G cannot be selected. Which items should be selected to maximize the value of the shipment?