BA.20
Profit Manager
Quick Reference Guide
é
English
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
é
2-ENG
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
sunlight and high temperatures.
J
.
20 from prolonged periods of direct
-
Calculator Display
Memory Indicator
Sign
Minus
Error Indicator
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).
M
.
E
Number other than 0 is stored in memory.
Number in the display is negative.
Error condition.
3-ENG
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 E is 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
R
0
H
G
D
Note:
are entered.
Clears the calculator and the memory.
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.
R
Press
memory is not affected.
– 9Enters digits 0 through 9.
Enters a decimal point.
Changes the sign of the displayed number.
Displays the result of a calculation.
The BA
twice to clear the calculator; the
20 completes arithmetic operations as they
-
4-ENG
Examples
7.921 + 1.6
7.921
12 Q 13
12
-
@
1.6 E 12.321
= ?
6
B
13 C 6
12.321 = ?
D
D
2.8 –
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
the operation and the number that follows it.
2 + 3
= ?; 4 + 3 = ?; 6 + 3 = ?
@
D
3
2
D
4
D
6
8 - 6 = ?; 3 - 6 = ?; 10 - 6 = ?
E
D
6
8
D
3
D
10
27 P 3 = ?; 15 P 3 = ?; 24 P 3 = ?
C
D
3
27
D
15
D
24
5-ENG
D
.
D
repeats
5.
7.
9.
2.
3.
-
4.
9.
5.
8.
For multiplication, pressing D repeats the operation and
the number that precedes it.
8 = ?; 3 Q 15 = ? ; 3 Q 30 = ?
3
Q
B
D
3
15
30
8
D
D
24.
45.
90.
Squares and Square Roots
To square a number, enter the number and press
2
= ?
2.5
B D
2.5
(1.6 x 2.5)2 = ?
B
2.5 B
D
1.6
To find the square root of a number, enter the number and
A
press
.
144 = ?
A
1 44
162 + 33 = ?
B D @
16
Note:
Attempting to find the square root of a negative
33 D
A
number results in an error.
6-ENG
B D
.
6.25
16.
12.
17.
Percent Calculations
Percentages:
250
Add-ons:
250
— or —
250
@ D
Discounts:
250
— or —
250
E D
Ratios:
600
Combinations:
plus 4% tax = ?
129
5% of $250 = ?
B
F
5
$250 plus 5% markup = ?
@
F
5
B
F
5
$250 less 5% discount = ?
E
I
5
B
F
5
$600 is what percent of $1,500?
C
F
1500
$129 less 25% discount
E
25 F @ 4
F
7-ENG
12.5
262.5
12.5
262.5
237.5
12.5
237.5
40.
100.62
Cost, Sell, and Margin
The BA-20 assists you in making informed decisions
concerning cost, selling price, and profit margin.
CST
SEL
MAR
CST
SEL
MAR
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 costsell-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.
MAR
8-ENG
CST
SEL
Determine the Cost
If the selling price of an item is $1.25 and
the margin is 20%, find the cost of the item?
Q
1.25
20 K 1.
Determine the Selling Price
If the cost of an item is $1.00 and the margin
is 20%, find the selling price.
S
1
Determine the Margin
If the cost of an item is $1.00 and the selling
price is $1.25, find the margin percentage.
1
K
20
S
1.25 Q 20.
(CST column keys)
(SEL column keys)
1.25
(MAR column keys)
Memory Operations
appears in the display when the memory contains a
M
number other than zero.
L
L L
M
N
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.
9-ENG
Examples
(4
11.99) - (12 Q 0.98) = ?
Q
L L
12 B .98
L
7.9 + 8.1
(5.2 + 2.8)
-
L L
7.9 @ 8.1
L D
4 B 11.99
N
= ?
5.2 @ 2.8
C
M
N
47.96
11.76
36.2
8.
16.
2.
M
M
M
M
M
M
4 Q 11.99 = x; 43.15 - x = ?
L L
4 B 11.99 M 47.96
43.15 E L D 4.81
M
M
10-ENG
Error Conditions
An error/overflow condition is indicated by
R
Press
J
calculations after you have cleared the overflow condition
by pressing
An error occurs when you attempt to:
¦
¦
¦
¦
¦
¦
once to clear the error, press R twice or
once to clear the calculator. Do not continue
R
once.
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.
E
in the display.
In Case of Difficulty
Expose the calculator to adequate light.
¦
Review the instructions and repeat the calculation.
¦
11-ENG
TI Support and Service Information
For General Information
E-mail:
Phone:
ti-cares@ti.com
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: 1-972-917-8324
For Product (hardware) Service
Customers in the U.S., Canada, Mexico, Puerto Rico
and Virgin Islands:
Customer Support before returning a product for
service.
All other customers:
this product (hardware) or contact your local Texas
Instruments retailer/distributor.
Always contact Texas Instruments
Refer to the leaflet enclosed with
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.
12-ENG
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