There are two mutually exclusive alternatives X and Y for a security system. Please answer the following three questions (a)-(d). Assume MARR = 10%.

	Alt. X	Alt. Y
First cost, $	-90,000	-900,000
M&O costs, $ per year	-30,000	-13,000
Salvage value, $	7,000	-
Life, years	3	Infinite

a) Calculate the capital recovery for Alt. X

b) Calculate the capitalized cost for Alt. Y

c) Use Present Worth analysis to compare these two alternatives and select the more economical one.

d) Use Annual Worth analysis to compare these two alternatives and select the more economical one.