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Bond price = Present value of annual interest + Present value of redemption price (face value)
= 400 x P/A(7%, 10) + 10,000 x P/F(7%, 10)
= 400 x 7.0236** + 10,000 x 0.5083**
= 2,809.44 + 5,083
= 7,892.44
Since bond price is lower than face value, the engineer should buy the bond now at a lower price ($7,892.44) and will get a higher price after 10 years ($10,000).
**From P/A and P/F Factor tables
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