diff --git a/market share spreadsheet.numbers b/_data/market share spreadsheet.numbers
similarity index 100%
rename from market share spreadsheet.numbers
rename to _data/market share spreadsheet.numbers
diff --git a/mba/ch49.org b/mba/ch49.org
index 17401a7..b0e3689 100644
--- a/mba/ch49.org
+++ b/mba/ch49.org
@@ -40,12 +40,20 @@
 *** list assumptions
 - start with sales
 
+** example market analysis spreadsheets
+*** link:
+[[../_data/market share spreadsheet.numbers][market share spreadsheet.numbers]]
+
 * Market Analysis Table
-| Number of Potential Customers  | 500,000            |                |   |
-| ASP (Average Selling Price)    | ₪100,000.00        |                |   |
-| TAM (Number x ASP)             | ₪50,000,000,000.00 |                |   |
-| Percent Market Share (Year 10) | 10%                | ₪5,000,000,000 |   |
-| Units by Year 10               | 50,000             |                |   |
+| Item                           | Value       | Calculation                                     | Results          |
+|--------------------------------+-------------+-------------------------------------------------+------------------|
+| Number of Potential Customers  | 500,000     |                                                 |                  |
+| ASP (Average Selling Price)    | ₪100,000.00 |                                                 |                  |
+| TAM (Total Accessible Market)  |             | Num of Potential Custom * Average Selling Price | ₪50,000,000,000. |
+| Percent Market Share (Year 10) | 10%         | Percent Market * Total Accessible Market        | ₪5,000,000,000   |
+| Expected Units by Year 10      | 50,000      |                                                 |                  |
+
+
 
 * Sales Growth Table
 | Year | Title            | Units Sold | Year Over Year Growth % | Revenue           | Notes |