from 6.1% to 8.7%. Chris feels that he must earn at least $31.00 per hour on the time he devotes to his research. a. Find the cost of Chris's research. b. By how much (in dollars) will Chris's return increase as a result of the research? c. On a strict economic basis, should Chris perform the proposed research? a. Chris's research costs? (Round to the nearest cent.) b. Chris's return will increase by $ (Round to the nearest cent.)