Texas Instruments BA-20 Profit Manager User manual

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
é
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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Turning the Calculator On and Off
To turn the BA
-
20 on, expose the solar panel to an
adequate light and press
J
.
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
J
Clears the calculator and the memory.
R
Press once to correct entry errors. Pressing
R
before
@
,
E
,
B
, or
C
clears the
display without affecting calculations. Pressing
R
immediately after
@
,
E
,
B
, or
C
clears
the calculation.
Press
R
twice to clear the calculator; the
memory is not affected.
0
–
9
Enters digits 0 through 9.
H
Enters a decimal point.
G
Changes the sign of the displayed number.
D
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
E
12.321
D
2.8 –
12
Q
13
6= ?
12
B
13
C
6
D
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
D
.
For addition, subtraction, and division, pressing
D
repeats
the operation and the number that follows it.
2 + 3 = ?; 4 + 3 = ?; 6 + 3 = ?
2
@
3
D
5.
4
D
7.
6
D
9.
8
-
6 = ?; 3
-
6 = ?; 10
-
6 = ?
8
E
6
D
2.
3
D
3.
-
10
D
4.
27
P
3 = ?; 15
P
3 = ?; 24
P
3 = ?
27
C
3
D
9.
15
D
5.
24
D
8.

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For multiplication, pressing
D
repeats the operation and
the number that precedes it.
3
Q
8 = ?; 3
Q
15 = ? ; 3
Q
30 = ?
3
B
8
D
24.
15
D
45.
30
D
90.
Squares and Square Roots
To square a number, enter the number and press
B D
.
2.52= ?
2.5
B D
6.25
(1.6 x 2.5)2= ?
1.6
B
2.5
B D
16.
To find the square root of a number, enter the number and
press
A
.
144 = ?
1 44
A
12.
162+ 33 = ?
16
B D @
33
D A
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
B
5
F
12.5
Add-ons: $250 plus 5% markup = ?
250
@
5
F
262.5
—or —
250
B
5
F
12.5
@ D
262.5
Discounts: $250 less 5% discount = ?
250
E
5
I
237.5
—or —
250
B
5
F
12.5
E D
237.5
Ratios: $600 is what percent of $1,500?
600
C
1500
F
40.
Combinations: $129 less 25% discount
plus 4% tax = ?
129
E
25
F @
4
F
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
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
Q
20
K
1.
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
S
20
K
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
S
1.25
Q
20.
Memory Operations
Mappears in the display when the memory contains a
number other than zero.
L
Recalls the value in memory to the display.
L L
Clears memory.
M
Adds the displayed value to the value in
memory.
N
Subtracts the displayed value from the value
in memory.

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Examples
(4
Q
11.99)
-
(12
Q
0.98) = ?
L L
4
B
11.99
M
47.96 M
12
B
.98
N
11.76 M
L
36.2 M
7.9 + 8.1
-
(5.2 + 2.8) = ?
L L
5.2
@
2.8
N
8. M
7.9
@
8.1
C
16. M
L D
2. M
4
Q
11.99 = x; 43.15
-
x = ?
L L
4
B
11.99
M
47.96
M
43.15
E L D
4.81
M

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Error Conditions
An error/overflow condition is indicated by Ein the display.
Press
R
once to clear the error, press
R
twice or
J
once to clear the calculator. Do not continue
calculations after you have cleared the overflow condition
by pressing
R
once.
An error occurs when you attempt to:
¦
Enter data into a cost, sell, or margin calculation using
an incorrect key sequence (page 8).
¦
Enter an integer with more than 10 digits (page 4).
¦
Perform a calculation that results in an overflow more
than 10 digits to the left of the decimal point (page 3).
¦
Add a number to memory that would exceed its 10-digit
capacity (page 9).
¦
Divide a number by zero.
¦
Find the square root of a negative number.
In Case of Difficulty
¦
Expose the calculator to adequate light.
¦
Review the instructions and repeat the calculation.

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TI Support and Service Information
For General Information
E-mail: [email protected]
Phone:
1.800.TI.CARES
(1.800.842.2737)
For U.S., Canada, Mexico, Puerto
Rico, and Virgin Islands only
Home Page: education.ti.com
For Technical Questions
Phone: [phone]
For Product (hardware) Service
Customers in the U.S., Canada, Mexico, Puerto Rico
and Virgin Islands:
Always contact Texas Instruments
Customer Support before returning a product for
service.
All other customers: Refer to the leaflet enclosed with
this product (hardware) or contact your local Texas
Instruments retailer/distributor.
Service and Warranty Information
For information about the length and terms of the warranty
or about product service, refer to the warranty statement
enclosed with this product or contact your local Texas
Instruments retailer/distributor.