= 11-21 The air pollution project discussed in the chapter has progressed over the past several weeks, and it is now the end of week 8. Lester Harky would like to know the value of the work completed, the amount of any cost overruns or underruns for the project, and the extent to which the project is ahead of or behind schedule by developing a table like Table 11.8. The revised cost figures are shown in the following table:

Activity Percent of Completion Actual Cost ($)

A 100 20,000 B 100 36,000 C 100 26,000 D 100 44,000 E 50 25,000 F 60 15,000 G 10 5,000 H 10 1,000