EC-2032 (650-0591) Operation Faxback Doc. # 16128 TURNING THE CALCULATOR ON AND OFF Press ON/AC to turn on the calculator. If the calculator is on, pressing ON/AC resets the memory and the display to 0. The calculator automatically turns off after about 7 minutes if no key is pressed. OPERATING THE CALCULATOR In addition to the arithmetic functions (+, -, x, -:-), this calculator uses these special function keys: +/- Key Press to change the displayed number from positive (+) to negative (-) or from negative (-) to positive (+). ─> Key Press to delete the last digit pressed. Useful when you press the wrong digit. 00 Key Press to enter two zeros at one time. CE Key Press to delete the displayed number without losing any numbers in the memory. If a result is more than 12 digits, the calculator stops and displays ERROR. Press CE to remove ERROR and resume calculating. DECIMAL PLACE Switch The switch sets how many numbers appear to the right of the decimal point in the displayed result. Example: 22 -:- 7 = ? Switch Position: 0 2 3 4 + Displayed Result: 3 3.14 3.142 3.1428 3.14 The + position automatically inserts a decimal point before the last two digits for financial calculations. FLOATING POINT Switch F - displays as many number so the right of the decimal point as possible. 5/4 - rounds off the rightmost digit of the result to the next highest number if the next digit if 5 or more. Rounds off to the next lowest number if the next digit if 4 or less. DOWN ARROW - rounds off the rightmost digit of the result to the next lowest number. PERFORMING CALCULATIONS Addition (+) ┌─┐┌─┐┌─┐┌─┐ Example: 6 + 7 = 13 │6││+││7││=│ 13 └─┘└─┘└─┘└─┘ Subtraction (-) ┌──┐┌─┐┌─┐┌─┐ Example: 10 - 4 = 6 │10││-││4││=│ 6 └──┘└─┘└─┘└─┘ Multiplication (x) ┌─┐┌─┐┌─┐┌─┐ Example: 7 x 5 = 35 │7││x││5││=│ 35 └─┘└─┘└─┘└─┘ Division (-:-) ┌──┐┌───┐┌─┐┌─┐ Example: 14 -:- 7 = 2 │14││-:-││7││=│ 2 └──┘└───┘└─┘└─┘ Square Root ┌─┐┌─┐┌────┐ Example: Calculate the Square Root of 64 │6││4││SQRT│ 8 └─┘└─┘└────┘ Percentages (%) ┌─┐┌─┐┌─┐┌─┐┌─┐ Example: What is 6% of 48? │4││8││x││6││%│ 2.88 └─┘└─┘└─┘└─┘└─┘ GRAND TOTAL Key Every time the = key is pressed, the number in the display is memorized and GRAND TOTAL appears in the display. Press GT to display the sum of all memorized numbers. Clear the grand total by pressing ON/AC. ┌─┐┌─┐┌─┐┌─┐ Example: Calculate A + B + C │6││x││7││=│ 42 └─┘└─┘└─┘└─┘ A = 6 x 7 ┌─┐┌─┐┌─┐┌─┐ B = 5 + 4 │5││+││4││=│ 9 C = 22 - 5 └─┘└─┘└─┘└─┘ ┌─┐┌─┐┌─┐┌─┐┌─┐ │2││2││-││5││=│ 17 └─┘└─┘└─┘└─┘└─┘ ┌──┐ │GT│ 68 └──┘ The GT (Grand Total) key lets you perform cash register calculations simply and quickly. Example: Calculate the total price and tax for the following purchases: ┌─┐┌─┐┌─┐┌─┐┌─┐┌─┐┌─┐ 9 Items at │5││.││4││9││x││9││=│ 49.41 $5.49 each. └─┘└─┘└─┘└─┘└─┘└─┘└─┘ ┌─┐┌─┐┌─┐┌─┐┌─┐┌─┐┌─┐ 5 Items at │3││.││2││9││x││5││=│ 16.45 $3.29 each. └─┘└─┘└─┘└─┘└─┘└─┘└─┘ ┌─┐┌─┐┌─┐┌─┐┌─┐┌─┐┌─┐ 4 Items at │1││.││9││9││x││4││=│ 7.96 $1.99 each. └─┘└─┘└─┘└─┘└─┘└─┘└─┘ ┌──┐ Get Subtotal │GT│ 73.82 └──┘ Add 6% Sales Tax and ┌─┐┌─┐┌──┐ display the total amount. │x││6││MU│ 78.25 └─┘└─┘└──┘ ┌──┐ What is the Sales Tax? │MU│ 4.43 └──┘ MARK-UP Key Used to calculate profit margins and retail prices. Example: Determine the final price of an item costing $70 adding a 5% Sales Tax. ┌─┐┌─┐┌─┐┌─┐┌──┐ │7││0││x││5││MU│ 73.50 └─┘└─┘└─┘└─┘└──┘ ┌──┐ What is the Sales Tax? │MU│ 30.50 └──┘ Example: Calculate the final price of an item selling for $70 marked down 25%: ┌─┐┌─┐┌─┐┌─┐┌─┐┌───┐┌──┐ │7││0││x││2││5││+/-││MU│ 52.50 └─┘└─┘└─┘└─┘└─┘└───┘└──┘ ┌──┐ What is the total discount? │MU│ 17.50 └──┘ Example: Calculate the gross profit margin of an item costing $100 that sells for $150: ┌─┐┌──┐┌─┐┌─┐┌─┐┌─┐ ┌──┐ │1││00││-││1││5││0│ │MU│ -33.33 └─┘└──┘└─┘└─┘└─┘└─┘ └──┘ Disregard the minus (-) sign and read the gross profit margin as 33.33%. Example: Calculate the selling price of an item costing $100 adding a 50% gross profit margin. (Set the floating point switch to F and the decimal place switch to any position but +). ┌─┐┌──┐┌───┐┌─┐┌─┐┌──┐ │1││00││-:-││5││0││MU│ 200 └─┘└──┘└───┘└─┘└─┘└──┘ The final selling price is $200. ┌──┐ Determine profit. │MU│ 100 └──┘ Example: Calculate the original cost of an item selling for $200 with a gross profit margin of 33%. ┌─┐┌─┐┌─┐┌─┐┌─┐┌─┐┌───┐┌──┐ │2││0││0││x││3││3││+/-││MU│ 134 └─┘└─┘└─┘└─┘└─┘└─┘└───┘└──┘ The original cost is $134. ┌──┐ Determine profit. │MU│ 66 └──┘ MEMORY FUNCTIONS ┌──┐ │M+│ Press to add the displayed number into memory. MEMORY appears in the └──┘ display. ┌──┐ │M-│ Press to subtract the currently displayed number from memory. MEMORY └──┘ appears in the display. ┌──┐ │MR│ Press to display the number stored in memory. └──┘ ┌──┐ │MC│ Press to clear the memory. MEMORY disappears from the display. └──┘ IMPORTANT NOTE Constant Feature To perform the same calculation repeatedly on the displayed number, press the function key (+, -, x, -:-) twice. K appears in the display and the arithmetic function and the displayed value is designated as the constant. Each time you press =, the calculator performs the constant function and displays the results. Press the selected arithmetic function key again to remove the constant feature. K disappears. Examples: Calculate 3+3+3+3+3=15 You Press Display [3] [+] [+] [=] [=] [=] [=] 15 Calculate 5 x 1.07125 12.5 x 1.07125 28 x 1.07125 You Press Display 1.07125 [x] [x] 5 [=] 5.35625 12.5 [=] 13.390625 28 [=] 29.995 (ALL-07/25/95)