If you use Excel to model businesses, business processes, or business transactions, this course will change your life. You’ll learn how to create tools for yourself that will amaze even you. Unrestricted use of this material is available in two ways.

As a stand-alone Web site
It resides on your computer, and you can use it anywhere. No need for Internet access.
At this Web site
If you have access to the Internet whenever you want to view this material, you can purchase on-line access. Unlimited usage. I’m constantly making improvements and you’ll get them as soon as they’re available.

To Order On Line

 Order "Spreadsheet Models for Managers, on-line edition, one month" by credit card, for USD 69.95 each, using our secure server, and receive download instructions by return email.
 Order "Spreadsheet Models for Managers, on-line edition, three months" by credit card, for USD 199.00 each, using our secure server, and receive download instructions by return email.

To Order by Mail

 Make your check payable to Chaco Canyon Consulting, for the amount indicated: For the download: USD 199.00 For access online for three months: USD 199.00 For access online for one month: USD 69.95 And send it to: Chaco Canyon Consulting 700 Huron Avenue, Suite 19C Cambridge, MA 02138

To use the course software you’ll need some other applications, which you very probably already have. By placing your order, you’re confirming that you have the software you need, as described on this site.

 Quantity discounts
• When there is a quantity discount, there is an additional term in the cost equation:

where u(Q) is the unit price as a function of order size
• Here we’re computing not only the inventory costs, but buying costs as well.

To minimize total costs, take an experimental approach:
compute costs for each break in the quantity schedule.

The extra term represents the cost of buying the material. D is the total amount of material demanded. u(Q) is the unit price of that material. That unit price can be a function of the size of the order, as it would be, for instance, in the case of quantity discounts.

In many real problems, however, things are not so simple. For example, the cost of ordering, C0, can also depend on order size. This happens when unit freight charges depend on order size, and when internal handling costs depend on order size, among other things.