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Which bid to accept

I am trying to determine what the steps to solve homework assignment below are. I am confused with future and present value annuities. Please let me know what steps I have to do. If the formulas can be provided that would be great.

Assume that Wal-Mart, Inc has decided to surface and maintain for 10 years a vacant lot next to one of its stores to serve as a parking lot for customers. Management is considering the following bids involving two different qualities of surfacing for a parking area of 12,000 square yards.

Bid A: A surface that costs $5.75 per square yard to install. This surface will have to be replaced at the end of 5 years. The annual maintenance cost on this surface is estimated at $.25 per square yard for each year except the last year of its service. The replacement surface will be similar to the initial surface.

Bid B: A surface that costs $10.50 per square yard to install. This surface has a probable useful life of 10 years and will require annual maintenance in each year except the last year, at an estimated cost of $.09 per square yard.

Prepare computations showing which bid should be accepted by Wal-Mart, Inc. you may assume that the cost of capital is 9%, that the annual expenditures are incurred at the end of each year, and that prices are not expected to change during the next 10 years.

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Solution Preview

We need to compare the present value of total costs to make the decision.
Bid A - In this the costs are
Initial cost of 12,000 sq. yards X 5.75 per sq yd = $69,000. This cost will be incurred now and at the end of 5 years when the surface is to be replaced. The annual maintenance costs would be incurred in year 1 to 4 and year 6 to 9 as there is no cost in the last year of ...

Solution Summary

The solution explains how to calculate the present value to evaluate which bid should be accepted