EC-447  (650-0891)            Operation                Faxback Doc. # 6759


Press CE/E to turn on the calculator.  Then, adjust the display to the
best viewing angle.

The calculator automatically turns off about 6 minutes after the last
entry.

CORRECTING ERRORS

ERROR appears at the upper right of the display under the following
conditions:

  A calculation result exceeds 8 digits.

  A memory calculation exceed 8 digits.

  You try to divide by 0.

  You try to take the square root of a negative number.

If ERROR appears, press CE/E to clear the error.  Then re-enter the
calculation.


Markup and Gross Profit Calculations

The MU (markup) key is useful for making retail sales calculations. 
Markup determines the selling price based on the cost and the gross profit
margin.

You can also use this key to determine the gross profit margin when you
know the original cost and the selling price.  (Gross profit margin is the
percentage of the selling price that is profit).  Gross profit is
calculated using the following formula:

                  Price - Cost
                ---------------- = Gross Profit Margin
                     Price         

For example, if you purchase an item for $100 and want to sell it with a
20% gross profit margin, you would sell the item for $125.  Your profit is
$25, which is 20% of the selling price of $125.

An item cost $85.00.  How much should you sell the item for to obtain a
15% gross profit margin?

             85 (MU) 15 (%)                  100.

An item costs $120.00.  How much should you sell the item for to obtain a 
20% gross profit margin?

             120 (MU) 20 (%)                 150.00

An item costs $127.00 and sells for $219.50.  What is the gross profit
margin?

            219.5 (-) 127 (MU)               42.141231

Add-On and Discount Percentage Calculations

Add 15% onto 100                 100 (+) 15(%)                 115.
Discount 15% from 100            100 (-) 15(%)                  85.

(CJD/all-07/12/94)