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ENG5640.DOC TI-5640 Guidebook, English for Americas Texas
Instruments Inc Revised: 05/23/00 4:43 PM Printed: 06/22/00
5:31 PM Page 6 of 8
ENG5640.DOC TI-5640 Guidebook, English for Americas Texas
Instruments Inc Revised: 05/23/00 4:43 PM Printed: 06/22/00
5:31 PM Page 6 of 8
Using Memory Operations
DECIMAL =
2,
ROUND =
5/4
,
PRINTER =
ON
Multiplication with Memory Keys
You need the total of 3 items at 10.50 and
5 items at 4.95. By using the memory keys, you will not disturb a current
calculation.
Press Display Print
0
†
10.5
?
3
N
10.5 x
3. =
M 31.50 31.50 M+
4.95
?
5
N
4.95 x
5. =
M 24.75 24.75 M+
;
††
M 56.25 56.25 M
U
4.95
?
5
F
†††
4.95 x
5. =
M 24.75 24.75 M–
0
31.50 31.50 M
∗
† 0
prints the current memory total and clears the memory.
††
You calculate a memory subtotal to see the current total amount of
your order.
†††
You decide not to order the last item.
Calculating Gross Profit Margin
DECIMAL =
2,
ROUND =
5/4
,
PRINTER =
ON
Calculating a Profit Amount
An item cost you 65.00. You want to earn a 40%
profit. Calculate the selling price.
Press Display Print
2
65
#
65. 65. M
40
3
40.
43.333333333
%
@
∗
108.33 108.33
∗