You are evaluating two different silicon wafer milling machines. The Techron I costs $245,000, has a three year life, and has pretax operating costs of $63,000 per year. The Techron II costs $420,000, has a five year life, and has pretax operating costs of $35,000 per year. For both milling machines, use straight-line depreciation to zero over the project’s life and assume a salvage value of $40,000. If your tax rate is 22% and your discount rate is 10%, compute the EAC for both machines. Which do you prefer?

3. saving two consumers, larry and jeff, have utility functions defined over the two periods of their lives: middle age (period zero) and retirement (period 1). they have the same income in period 0 of m dollars and they will not earn income in period 1. the interest rate they face is r. larry’s and jeff’s utility functions are as follow. = 0.5 + 0.5 and = 0.5 + 0.5 for each person is between zero and one and represents each consumer’s temporal discount econ 340: intermediate microeconomics. ben van kammen: purdue university. rate. a. write the budget constraint that applies to both jeff and larry in terms of consumption in each period and ), interest rate, and m. b. what is larry’s and what is jeff’s marginal rate of intertemporal substitution? c. what is the slope of the budget constraint? d. write each consumer’s condition for lifetime utility maximization. e. re-arrange the conditions from part (d) to solve for the ratio, . f. if > which consumer will save more of his middle age income? g. if > 1 1+ , in which period will larry consume more: = 0 or = 1?