Bowman Builders manufactures steel storage sheds for commercial use. Joe Bowman, president of Bowman Builders, is contemplating producing sheds for home use. The activities necessary to build an experimental model and related data are given in the accompanying table. What is the normal cost of activities on the critical path? NORMAL CRASH NORMAL CRASH COST COST IMMEDIATE ACTIVITY TIME TIME ($) ($) PREDECESSORS A 3 2 1,000 1,600 B 2 2,000 2,700 300 300 3 1,300 1,600 A 3 850 1,000 B 2 4,000 5,000 C G 4 2 1,500 2,000 D, E