A Company is considering three types of tower cranes for the construction of the new mall. The cash flows for the three types are shown below:

Model	A	B	C
Purchase Cost	$10,000	$20,000	$30,000
Annual Operation Cost	$1,000	$800	$1,200
Annual Revenue	$2,800	$3,500	$4,500
Salvage Value	0	5000	0
Useful Life	10 Years	20 Years	30 Years

The alternatives could be replaced with another with identical cost and benefits. The MARR is 10%.

a- Which type of crane, should be selected?

b- If the useful life of crane A and Crane B is 30 years, and the two projects will maintain their annual revenue and annual operation cost the same for the whole period and the salvage value for Crane B will be 0 by the end of 30 years, which type of crane, should be selected

Solve it by COMPOUND INTEREST TABLES