Cases have no word$-$count requirement. Simply answer the questions for each case. Your work must be shown within your solution in order to receive credit for calculations$--$final numeric answers alone are insufficient. Each student is allowed only $1$ submission$--$make sure your case is complete before submission.

Solutions must be word$-$processed to receive credit. I prefer Excel or Word documents, but pdf files are acceptable. Do not worry if your Excel or Word document gets distorted in the Blackboard "pre$-$view" of your submission. The Blackboard word processor is not very powerful. As long as you attach your actual file, I can open it and review your work as you intended it to be submitted.

When using intermediate decimal calculations which require rounding, please use this rule for maximum accuracy of your final answer: decimals should be rounded to as many decimal places as there are digits in your underlying data. For example, if your data is in the ten millions $(10,000,000)$ you should round to eight decimal places. If your data is in the ten thousands $(10,000)$ you should round to $5$ decimal places.

To help make sure you get off to a good start on the Chapter $8$ Case, here is a hint:

The case may be approached in two ways:

Treat Req. $1$ and Req. $2$ independently. For Req. $1$ Calculate the yearly cash flows $($including tax effects$)$ from only the sales of smoke detectors. For Req. $2$ Determine the present values of your results from Req. $1$ and combine those present values with the present values of the remaining cash flow items in the case to determine NPV$.$

Treat Req. $1$ and Req. $2$ together as a part of a "big picture" approach. To do this, construct a spreadsheet similar to Exhibit $8\mathrm{.}2$ on page $276$ which incorporates all the cash flow items mentioned in the case. This is the approach I would recommend.