4-72. Find the value of the unknown quantity, Po, that establishes equivalence in the cash-flow diagram below. Suppose i = 20% per year. Use an annuity factor and a uniform gradient factor in your solution. (4.10) $1,400 1 $1,100 2 $800 $500 $500 $500 $500 $500 324 5 6 7 8 End of Year $2,000 10

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