Radio Shack 65-789 Owner's Manual - page 11
10
Operation
((Price - Cost)
÷
Price)
×
100 = Gross Profit
Margin (GPM)
Example 1: If an item costs you $100, how
much should you sell the item for to make a
20% profit?
Switch Setup:
P, F, IC+
Example 2: What is the selling price and
loss of a $100 item to be sold at a 20% loss
rate?
Switch Setup:
P, F, IC
+
Memory Calculations
The memory calculation feature lets you eas-
ily do multi-step calculations.
M+
adds the displayed value to memory. If
any multiplication or division is pending, the
calculator performs the calculation then adds
the result to memory and displays/prints it.
M–
subtracts the displayed value from mem-
ory. If any multiplication or division is pend-
ing, the calculator performs the calculation
then subtracts the result from memory and
displays/prints it.
MS
displays/prints the contents in memory
without clearing it.
MT
displays/prints the contents in memory
and clears it.
Note: When you press a memory or tax key,
the calculator prints a marker (
--------1--------)
to
make it easy to find your stored entries.
Example: (12
×
3) + (75
×
8) + (37
×
7) = 895
Switch Setup:
P, F,
Σ
Using Delta Percent
The profit for the previous year was $1500.
The profit for this year is $1800. What’s the
increased percentage?
Switch Setup:
P, F, IC+
Press
Display
Printout
C
0.
0. C
100 MU/MD
100.
100. M
20
=
20.%
25.
◊
∗
125.
125.
∗
Press
Display
Printout
C
0.
0. C
100 MU/
MD
100.
100. M
20 ± =
–20.
–20.%
–16.666666667
◊
∗
83.3333333
33
83.333333333
∗
Press
Display
Printout
MT
0.
--------1--------
0. M
∗
C
0.
0. C
12
×
12.
12.
×
3 M+
--------1--------
3. =
M 36.
36. M+
75
×
M 75.
75.
×
8 M
+
--------1--------
8. =
M 600.
600. M+
37
×
M 37.
37.
×
7 M
+
--------1--------
7. =
M 259.
259. M+
MT
895.
--------1--------
895. M
∗
Press
Display
Printout
C
0.
0. C
1500
∆
%
1'500.
1,500.
◊