1. 	Design 1	Design 2	Design 3	Design 4	Design 5
   Fixed capital investment	12000	13000	15000	17000	19000
   Sum of all op and fixed costs per year	3500	3000	2600	2400	2100

   A company must purchase one reactor to be used in an overall operation. Five reactors have been designed , all of which are equally capable of giving the required service . The following data apply to all five designs.

   If the company demands a 13 percent return on any unnecessary investment which of the five designs should be accepted and why. Show your calculations.