Assume that Wal-Mart Stores, 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 11,700 square yards.

Bid A: A surface that costs $5 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 cents 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 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 8 cents per square yard. (Use the tables below.)

 

8% 92593 1.78326 2.57710 3.31213 3.99271 4.62288 5.20637 5.74664 6.24689 6.71008 7.13896 7.53608 7.90378 8.24424 8.55948 8.85137 9.12164 9.37189 9.60360 9.81815 10.01680 10.20074 10.37106 10.52876 10.67478 10.80998 10.93516 11.05108 11.15841 11.25778 11.34980 11.43500 11.51389 11.58693 9% 91743 1.75911 2,53130 3.23972 3.88965 4.48592 5.03295 5.53482 5.99525 6.41766 6.80519 7.18073 7.48690 7.78615 8.06069 8.31256 8.54363 8.75563 8.95012 9.12855 9.29224 9.44243 9.58021 9.70661 9.82258 9.92897 10.02658 10.11613 10.19828 10.27365 10.34280 10.40624 10.46444 10.51784 TABLE 6-4 PRESENT VALUE OF AN ORDINARY ANNUITY OF 1 10% 90909 1.73554 2.48685 3.16986 3.79079 4.35526 4.86842 5.33493 5.75902 6.14457 6.49506 6.81369 7.10336 7.36669 7.60608 7.82371 8.02155 8.20141 8.36492 8.51356 8.64869 8.77154 8.88322 8.98474 9.07704 9.16096 9.23722 9.30667 9.36961 9.42691 9.47901 9.52638 9.56943 9.60858 11% 90090 1.71252 2.44371 3.10245 3.69590 4.23054 4.71220 5.14612 5.53705 5.88923 6.20652 6.49236 6.74987 6.96187 7.19087 7.37916 7.54879 7.70162 7.83929 7.96333 8.07507 8.17574 8.26643 8.34814 8.42174 8.48806 8.54780 8.60162 8.65011 8.69379 8.73315 8.76860 8.80054 8.82932 12% 89286 1.69006 2.40183 3.03735 3.60478 4.11141 4.56376 4.96764 5.32825 5.65022 5.93770 6.19437 6.42355 6.62817 6.81086 6.97399 7.11963 7.24967 7.36678 7.46944 7.56200 7.64465 7.71843 7.78432 7.84314 7.89566 7.94255 7.98442 8.02181 8.05518 8.08499 8.11159 8.13535 8.15666 15% .86957 1.62571 2.28323 2.85498 3.35216 3.78448 4.16042 4.48732 4.77158 5.01877 5.23371 5.42062 5.58315 5.72448 5.84737 5.95424 6.04716 6.12797 6.19823 6.25933 6.31246 6.35866 6.39884 6.43377 6.46415 6.49056 6.51353 6.53351 6.55088 6.56598 6.57911 6.59053 6.60046 6.60910 (n) Periods 12345 67699 8 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34