Engineering Economy (17th Edition)
17th Edition
ISBN: 9780134870069
Author: William G. Sullivan, Elin M. Wicks, C. Patrick Koelling
Publisher: PEARSON
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Chapter 1, Problem 18P
Owing to the rising cost of copper, in 1982 the U.S. Mint changed the composition of pennies from 95% copper (and 5% zinc) to copper (and 97.5% zinc) 2.5% to save money. Your favorite aunt has a collection of 5,000 pennies minted before 1982, and she intends on gifting the collection to you.
- a. What is the collection’s value based on metal content alone? Copper sells for $3.50 per pound and zinc for $1 per pound. It takes approximately 130 pre-1982 pennies to add up to one pound of total weight.
- b. If it cost the U.S. Mint $0.017 to produce a penny in 2012, is it time to eliminate pennies and round off all financial transactions to the nearest 5 cents (nickel)? As a matter of interest, it cost the government almost 10 cents to produce a nickel in 2012.
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