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I dont get these two questions? How should I calculate the answer?

A) Sam intends to retire in 6 yrs. To supplement his pension he would like to receive $\$234$ every 2 weeks for 10 yrs. If he is to receive the first payment three months after his retirement and interest is $5\%$ p.a. compounded quarterly, how much must he invest today to achieve his goal?

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It might help if you explain a little bit about what you're not understanding. Do you understand what the problem is asking you for? –  crf Dec 5 '12 at 8:36

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