Texas Instruments BA-20 Profit Manager Manual de usuario

Ba20eng.doc BA-20 UK English Susan Gullord

Rev: 11/25/02 8:38 AM Pr: 11/25/02 8:43 AM 1 of 12



BA.20

Profit Manageré

Quick Reference Guide

English

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Ba20eng.doc BA-20 UK English Susan Gullord

Rev: 11/25/02 8:38 AM Pr: 11/25/02 8:43 AM 2 of 12

The BA

20 Profit Manager

Turning the Calculator On and Off ................................ 3

Calculator Display ......................................................... 3

Accuracy and Rounding Information............................. 4

Basic Operations........................................................... 4

Calculations with a Constant......................................... 5

Squares and Square Roots........................................... 6

Percent Calculations ..................................................... 7

Cost, Sell, and Margin................................................... 8

Memory Operations ...................................................... 9

Error Conditions .......................................................... 11

In Case of Difficulty ..................................................... 11

TI Support and Service Information ............................ 12

Service and Warranty Information .............................. 12



2000, 2002 Texas Instruments Incorporated

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Ba20eng.doc BA-20 UK English Susan Gullord

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Turning the Calculator On and Off

To turn the BA

20 on, expose the solar panel to an

adequate light and press

The BA

20 turns off when the solar panel is no longer

exposed to the light.

Protect your BA

20 from prolonged periods of direct

sunlight and high temperatures.

Calculator Display

You can enter and display 10-digit numbers (with a

maximum of 9 digits to the right of the decimal).

Apostrophes separate large numbers into hundreds,

thousands, etc. (such as 44’444’444).

MNumber other than 0 is stored in memory.

Number in the display is negative.

EError condition.

Memory Indicator

Minus Sign

Error Indicator

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Accuracy and Rounding Information

Calculations are accurate to the tenth digit. When a

calculation result exceeds 9999999999, the first 10 digits

are displayed with a decimal point 10 places to the left of

its true position, and Eis displayed. Position the decimal

point correctly by mentally moving it 10 places to the right

and inserting zeros as required.

Calculations with more than 10 digits to the right of the

decimal point are rounded to 10 digits.

Basic Operations

Clears the calculator and the memory.

Press once to correct entry errors. Pressing

before

, or

clears the

display without affecting calculations. Pressing

immediately after

, or

clears

the calculation.

Press

twice to clear the calculator; the

memory is not affected.

–

Enters digits 0 through 9.

Enters a decimal point.

Changes the sign of the displayed number.

Displays the result of a calculation.

Note: The BA

20 completes arithmetic operations as they

are entered.

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Examples

7.921 + 1.6

12.321 = ?

7.921

1.6

12.321

2.8 –

6= ?

26.

Calculations with a Constant

The BA

20 retains the last operation and its associated

number. This allows you to repeat calculations by entering

only the new number and pressing

For addition, subtraction, and division, pressing

repeats

the operation and the number that follows it.

2 + 3 = ?; 4 + 3 = ?; 6 + 3 = ?

6 = ?; 3

6 = ?; 10

6 = ?

3 = ?; 15

3 = ?; 24

3 = ?

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For multiplication, pressing

repeats the operation and

the number that precedes it.

8 = ?; 3

15 = ? ; 3

30 = ?

24.

45.

90.

Squares and Square Roots

To square a number, enter the number and press

2.52= ?

2.5

6.25

(1.6 x 2.5)2= ?

1.6

2.5

16.

To find the square root of a number, enter the number and

press

144 = ?

1 44

12.

162+ 33 = ?

17.

Note: Attempting to find the square root of a negative

number results in an error.

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Percent Calculations

Percentages: 5% of $250 = ?

250

12.5

Add-ons: $250 plus 5% markup = ?

250

262.5

—or —

250

12.5

262.5

Discounts: $250 less 5% discount = ?

250

237.5

—or —

250

12.5

237.5

Ratios: $600 is what percent of $1,500?

600

1500

40.

Combinations: $129 less 25% discount

plus 4% tax = ?

129

100.62

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Cost, Sell, and Margin

The BA

20 assists you in making informed decisions

concerning cost, selling price, and profit margin.

CST

SEL

MAR

SEL

CST

MAR

CST

SEL

Using the keys in the CST, SEL, and MAR columns, any

one of these figures can be calculated when the other two

are known.

The following points should be noted while working cost-

sell-margin problems:

The column of keys you use is determined by the type

of calculation you want to make.

Within each column, two keys identify the data

required for that calculation.

Data for the top key must be entered prior to data for

the lower key.

The results are displayed after the last entry has been

made.

An error message is displayed if the data is entered out

of sequence or entered using keys from different

columns.

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Determine the Cost (CST column keys)

If the selling price of an item is $1.25 and

the margin is 20%, find the cost of the item?

1.25

Determine the Selling Price (SEL column keys)

If the cost of an item is $1.00 and the margin

is 20%, find the selling price.

1.25

Determine the Margin (MAR column keys)

If the cost of an item is $1.00 and the selling

price is $1.25, find the margin percentage.

1.25

20.

Memory Operations

Mappears in the display when the memory contains a

number other than zero.

Recalls the value in memory to the display.

Clears memory.

Adds the displayed value to the value in

memory.

Subtracts the displayed value from the value

in memory.

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Examples

11.99)

(12

0.98) = ?

11.99

47.96 M

.98

11.76 M

36.2 M

7.9 + 8.1

(5.2 + 2.8) = ?

5.2

2.8

8. M

7.9

8.1

16. M

2. M

11.99 = x; 43.15

x = ?

11.99

47.96

43.15

4.81

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