Johnson Industries received a contract to develop and produce four high-intensity long-distance receiver/transmitters for cellular telephones. The first took 2,400 labor hours and $42,000 worth of purchased and manufactured parts; the second took 1,460 labor hours and $29,820 in parts; the third took 1,160 labor hours and $25,200 in parts; and the fourth took 861 labor hours and $20,580 in parts. Johnson was asked to bid on a follow-on contract for another dozen receiver per transmitter units. (Hint: There are two learning curves -one for labor and one for parts.) Use a. Ignoring any forgetting factor effects, how many labor hours should Johnson estimate are needed for the additional 12 units? Note: Round your answer to the nearest whole number. Answer is complete but not entirely correct. b. How much should Johnson estimate the parts cost will be for the additional 12 units? Note: Round your answer to the nearest dollar amount. Answer is complete but not entirely correct. Exhibit 6.5 Improvement Curves: Table of Cumulative Values