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
2-ENG
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
3-ENG
Ba20eng.doc BA-20 UK English Susan Gullord
Rev: 11/25/02 8:38 AM Pr: 11/25/02 8:43 AM 3 of 12
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
4-ENG
Ba20eng.doc BA-20 UK English Susan Gullord
Rev: 11/25/02 8:38 AM Pr: 11/25/02 8:43 AM 4 of 12
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.
5-ENG
Ba20eng.doc BA-20 UK English Susan Gullord
Rev: 11/25/02 8:38 AM Pr: 11/25/02 8:43 AM 5 of 12
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.
6-ENG
Ba20eng.doc BA-20 UK English Susan Gullord
Rev: 11/25/02 8:38 AM Pr: 11/25/02 8:43 AM 6 of 12
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.
7-ENG
Ba20eng.doc BA-20 UK English Susan Gullord
Rev: 11/25/02 8:38 AM Pr: 11/25/02 8:43 AM 7 of 12
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
8-ENG
Ba20eng.doc BA-20 UK English Susan Gullord
Rev: 11/25/02 8:38 AM Pr: 11/25/02 8:43 AM 8 of 12
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.
9-ENG
Ba20eng.doc BA-20 UK English Susan Gullord
Rev: 11/25/02 8:38 AM Pr: 11/25/02 8:43 AM 9 of 12
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.
10-ENG
Ba20eng.doc BA-20 UK English Susan Gullord
Rev: 11/25/02 8:38 AM Pr: 11/25/02 8:43 AM 10 of 12
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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