Tipton Corporation is investigating automating a process by purchasing a machine for $805,500 that would have a 9 year useful life and no salvage value. By automating the process, the company would save $139,500 per year in cash operating costs. The new machine would replace some old equipment that would be sold for scrap now, yielding $22,500. The annual depreciation on the new machine would be $89,500. The simple rate of return on the investment is closest to:

Suppose either computers or televisions can be assembled with the following labor inputs: units produced 1 2 3 4 5 6 7 8 9 10 total labor used 3 7 12 18 25 33 42 54 70 90 (a) draw the production possibilities curve for an economy with 54 units of labor. label it p54. (b) what is the opportunity cost of the eighth computer? (c) suppose immigration brings in 36 more workers. redraw the production possibilities curve to reflect this added labor. label the new curve p90.