7-42. A rm must decide between two silicon layer chip designs from Intel. Their effective income tax rate is 20%, and MACRS depreciation is used. If the desired aftertax return on investment is 10% per year, which design should be chosen? State your assumptions. (7.10) Design A Design 8 Capital investment $1,000,000 $2,000,000 MV at end of useful life $1,000,000 $1,100,000 Annual revenues less $200,000 $400,000 expenses MACRS property class 5 years 5 years Useful life 7 years 6 years