The Challenger vs. Defender Incremental method must be used.

(25 Pts.)2. Five methods could be used to recover grease from a rendering plant wastewater stream. The investment costs and incomes associated with each one are shown in the table below. Assume that all methods have a 10 year life with zero salvage value. The MARR 15% per year. Select which method should be used, if any, using an Incremental Modified Benefit/Cost analysis First Cost AOC Annual Income Method A Method B Method C $19,000 $12,000 $20,000 $15,000 $10,000 S15,000 $48,000 $13,000 $27,000 Method D Method F $25,000 S9,000 S19,000 $33,000 $11,000 S22,000