Using memory operations, Calculating gross profit margin – Texas Instruments TI-5640 User Manual
Page 7
6
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
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
2
65
#
65.
65. M
40
3
40.
43.333333333
%
@
∗
108.33
108.33
∗