assume the inches rate is 8% compounded annually

1) 80,000 per year for 10 years beginning at the end of the current year

2) 150,000 down payment due immediately 100,000 per year for eight years beginning at the end of the fouth year after the initial purchase

3) 70,000 due immediately and at the beginning of each for 10 years

what option should thr company chose

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thank you