A Staff Assistant at Warrington Corporation Recently Determined That the First

Multiple Choice

A staff assistant at Warrington Corporation recently determined that the first five units completed in a new manufacturing process took 500 hours to complete, or an average of 100 hours per unit. The assistant also found that when the cumulative output produced doubles, the average labor time declines by 20%. On the basis of this information, how many total hours would Warrington use if it produces a cumulative amount of 40 units?

A) 128.
B) 160.
C) 1,280.
D) 2,048.
E) None of the answers is correct.