Ehrlich invested $200 each in Copper, Chrome, Nickel, Tin and Tungsten, which resulted in the following volumes purchased (see: the investment good column). The 1990 value of these goods, in $1980 dollars is shown in the 1990 price column.

Investment Good	1980 price (1980 dollars)	1990 price (1980 dollars)	Percentage change
Copper (195.56 lbs.)	$200	$163	-18.50%
Chrome (51.28 lbs.)	$200	$120	-40%
Nickel (63.52 lbs.)	$200	$193	-3.50%
Tin (229.1 lbs.)	$200	$56	-72%
Tungsten (13.64 lbs.)	$200	$86	-57%

Reflect on the goods that Ehrlich invested in. Then answer the following questions:

(a) Do you anticipate that this result would have been different if he had invested in non-metals, such as petroleum, cotton or cattle? How so?

(b) If the investment had been made for 35 years instead of 10, do you think that the outcome would have been different? Why?

(c) Select one of the materials that Ehrlich invested in, and search online for its value (per lb) today. Multiply this per-pound value times the pounds that Ehrlich purchased, and divide it by 2.87 (this will deflate/put the 2015 value in $1980 dollars). How does the 1980 value compare to the 2015 value in $1980 terms?